diff --git a/source/blender/blenkernel/SConscript b/source/blender/blenkernel/SConscript
index a7e4d8807b2..f68e2b70c86 100644
--- a/source/blender/blenkernel/SConscript
+++ b/source/blender/blenkernel/SConscript
@@ -15,56 +15,58 @@ incs += ' ../gpu #/extern/glew/include'
 incs += ' ' + env['BF_OPENGL_INC']
 incs += ' ' + env['BF_ZLIB_INC']
 
-defs = ''
+defs = []
 
 if not env['WITH_BF_PYTHON']:
-	defs += 'DISABLE_PYTHON'
+	defs.append('DISABLE_PYTHON')
 else:
 	incs += ' ../python'
 	incs += ' ' + env['BF_PYTHON_INC']
+	if env['BF_DEBUG']:
+		defs.append('_DEBUG')
 
 if env['WITH_BF_QUICKTIME']:
-    incs += ' ../quicktime'
+	incs += ' ../quicktime'
 
 if env['WITH_BF_SDL']:
 	incs += ' ' + env['BF_SDL_INC']
 else:
-	defs += ' DISABLE_SDL'
+	defs.append('DISABLE_SDL')
 
 if env['WITH_BF_INTERNATIONAL']:
-	defs += ' WITH_FREETYPE2'
+	defs.append('WITH_FREETYPE2')
 
 if env['WITH_BF_VERSE']:
-	defs += ' WITH_VERSE'
+	defs.append('WITH_VERSE')
 	incs += ' ' + env['BF_VERSE_INCLUDE']
 
 if env['WITH_BF_VERSE']:
-	defs += ' WITH_VERSE'
+	defs.append('WITH_VERSE')
 	
 if env['WITH_BF_OPENEXR']:
-    defs += ' WITH_OPENEXR'
+	defs.append('WITH_OPENEXR')
 
 if env['WITH_BF_OPENJPEG']:
-    defs += ' WITH_OPENJPEG'
+	defs.append('WITH_OPENJPEG')
 
 if env['WITH_BF_DDS']:
-    defs += ' WITH_DDS'
+	defs.append('WITH_DDS')
 
 if env['WITH_BF_FFMPEG']:
-    defs += ' WITH_FFMPEG'
-    incs += ' ' + env['BF_FFMPEG_INC']
+	defs.append('WITH_FFMPEG')
+	incs += ' ' + env['BF_FFMPEG_INC']
 
 if env['WITH_BF_QUICKTIME']:
-    defs += ' WITH_QUICKTIME'
-    incs += ' ' + env['BF_QUICKTIME_INC']
+	defs.append('WITH_QUICKTIME')
+	incs += ' ' + env['BF_QUICKTIME_INC']
 
 if env['WITH_BF_BULLET']:
-    defs += ' WITH_BULLET'
+	defs.append('WITH_BULLET')
 
 if env['BF_NO_ELBEEM']:
-    defs += ' DISABLE_ELBEEM'
+	defs.append('DISABLE_ELBEEM')
 
 if env['WITH_BF_PLAYER']:
-    SConscript(['bad_level_call_stubs/SConscript'])
+	SConscript(['bad_level_call_stubs/SConscript'])
 
-env.BlenderLib ( libname = 'bf_blenkernel', sources = sources, includes = Split(incs), defines = Split(defs), libtype=['core','player'], priority = [65, 20] )
+env.BlenderLib ( libname = 'bf_blenkernel', sources = sources, includes = Split(incs), defines = defs, libtype=['core','player'], priority = [65, 20] )
diff --git a/source/blender/nodes/SConscript b/source/blender/nodes/SConscript
index d38303d7d20..bf8df8a9156 100644
--- a/source/blender/nodes/SConscript
+++ b/source/blender/nodes/SConscript
@@ -17,29 +17,31 @@ incs += ' ../gpu #/extern/glew/include '
 incs += ' ' + env['BF_OPENGL_INC']
 incs += ' ' + env['BF_ZLIB_INC']
 
-defs = ''
+defs = [] 
 
 if env['WITH_BF_PYTHON']:
-    incs += ' ' + env['BF_PYTHON_INC']
-    incs += ' ../python'
+	incs += ' ' + env['BF_PYTHON_INC']
+	incs += ' ../python'
+	if env['BF_DEBUG']:
+		defs.append('_DEBUG')
 else:
-    defs += 'DISABLE_PYTHON'
+	defs.append('DISABLE_PYTHON')
 
 if env['WITH_BF_INTERNATIONAL']:
-    defs += ' WITH_FREETYPE2'
+	defs.append('WITH_FREETYPE2')
 
 if env['WITH_BF_OPENEXR']:
-    defs += ' WITH_OPENEXR'
+	defs.append('WITH_OPENEXR')
 
 if env['WITH_BF_FFMPEG']:
-    defs += ' WITH_FFMPEG'
-    incs += ' ' + env['BF_FFMPEG_INC']
+	defs.append('WITH_FFMPEG')
+	incs += ' ' + env['BF_FFMPEG_INC']
 
 if env['WITH_BF_QUICKTIME']:
-    defs += ' WITH_QUICKTIME'
-    incs += ' ' + env['BF_QUICKTIME_INC']
+	defs.append('WITH_QUICKTIME')
+	incs += ' ' + env['BF_QUICKTIME_INC']
 
-env.BlenderLib ( libname = 'bf_nodes', sources = sources, includes = Split(incs), defines = Split(defs), libtype=['intern', 'core', 'player'], priority = [200, 200, 400] )
-env.BlenderLib ( libname = 'bf_cmpnodes', sources = cmpsources, includes = Split(incs), defines = Split(defs), libtype=['intern', 'core', 'player'], priority = [200, 175, 300] )
-env.BlenderLib ( libname = 'bf_shdnodes', sources = shdsources, includes = Split(incs), defines = Split(defs), libtype=['intern', 'core', 'player'], priority = [200, 175, 300] )
-env.BlenderLib ( libname = 'bf_texnodes', sources = texsources, includes = Split(incs), defines = Split(defs), libtype=['intern', 'core', 'player'], priority = [200, 175, 300] )
+env.BlenderLib ( libname = 'bf_nodes', sources = sources, includes = Split(incs), defines = defs, libtype=['intern', 'core', 'player'], priority = [200, 200, 400] )
+env.BlenderLib ( libname = 'bf_cmpnodes', sources = cmpsources, includes = Split(incs), defines = defs, libtype=['intern', 'core', 'player'], priority = [200, 175, 300] )
+env.BlenderLib ( libname = 'bf_shdnodes', sources = shdsources, includes = Split(incs), defines = defs, libtype=['intern', 'core', 'player'], priority = [200, 175, 300] )
+env.BlenderLib ( libname = 'bf_texnodes', sources = texsources, includes = Split(incs), defines = defs, libtype=['intern', 'core', 'player'], priority = [200, 175, 300] )
diff --git a/source/blender/python/SConscript b/source/blender/python/SConscript
index 670041a6504..e869cfba556 100644
--- a/source/blender/python/SConscript
+++ b/source/blender/python/SConscript
@@ -14,17 +14,20 @@ defs = []
 if env['OURPLATFORM'] in ('win32-mingw') and env['BF_DEBUG']:
 	defs.append('Py_TRACE_REFS')
 
+if env['BF_DEBUG']:
+	defs.append('_DEBUG')
+
 if env['WITH_BF_QUICKTIME']:
 	incs += ' ' + env['BF_QUICKTIME_INC']
 	defs.append('WITH_QUICKTIME')
 	
 if env['WITH_BF_OPENEXR']:
-    defs.append('WITH_OPENEXR')
+	defs.append('WITH_OPENEXR')
 
 if env['WITH_BF_FFMPEG']:
-    defs.append('WITH_FFMPEG')
+	defs.append('WITH_FFMPEG')
 
 if env['BF_BUILDINFO']:
-    defs.append('NAN_BUILDINFO')
+	defs.append('NAN_BUILDINFO')
 
 env.BlenderLib ( libname='blender_python', sources = Split(sources), includes = Split(incs), defines = defs, libtype=['core','game2'], priority = [60,115] )
diff --git a/source/blender/src/SConscript b/source/blender/src/SConscript
index 2e5dda6c772..ff6db036459 100644
--- a/source/blender/src/SConscript
+++ b/source/blender/src/SConscript
@@ -34,39 +34,41 @@ incs += ' ' + env['BF_OPENGL_INC']
 defs = []
 
 if env['WITH_BF_PYTHON']:
-    incs += ' ../python ' + env['BF_PYTHON_INC']
+	incs += ' ../python ' + env['BF_PYTHON_INC']
+	if env['BF_DEBUG']:
+		defs.append('_DEBUG')
 else:
-    defs.append('DISABLE_PYTHON')
+	defs.append('DISABLE_PYTHON')
 
 
 if env['BF_TWEAK_MODE']:
-    defs.append('TWEAK_MODE')
+	defs.append('TWEAK_MODE')
 
 if not env['WITH_BF_YAFRAY']:
-    defs.append('DISABLE_YAFRAY')
+	defs.append('DISABLE_YAFRAY')
 
 if env['WITH_BF_INTERNATIONAL']:
-    incs += ' ../ftfont'
-    defs.append('INTERNATIONAL')
-    defs.append('FTGL_STATIC_LIBRARY')
+	incs += ' ../ftfont'
+	defs.append('INTERNATIONAL')
+	defs.append('FTGL_STATIC_LIBRARY')
 
 if env['WITH_BF_OPENEXR']:
-    defs.append('WITH_OPENEXR')
+	defs.append('WITH_OPENEXR')
 
 if env['WITH_BF_OPENJPEG']:
-    defs.append('WITH_OPENJPEG')
+	defs.append('WITH_OPENJPEG')
 
 if env['WITH_BF_DDS']:
-    defs.append('WITH_DDS')
+	defs.append('WITH_DDS')
 
 if env['WITH_BF_QUICKTIME']:
-    incs += ' ' + env['BF_QUICKTIME_INC']
-    defs.append('WITH_QUICKTIME')
+	incs += ' ' + env['BF_QUICKTIME_INC']
+	defs.append('WITH_QUICKTIME')
 
 if env['WITH_BF_ICONV']:
-    incs += ' ../quicktime'
-    incs += ' ' + env['BF_ICONV_INC']
-    defs.append('WITH_ICONV')
+	incs += ' ../quicktime'
+	incs += ' ' + env['BF_ICONV_INC']
+	defs.append('WITH_ICONV')
 
 if env['WITH_BF_GAMEENGINE']:
 	defs.append('GAMEBLENDER=1')
@@ -74,33 +76,33 @@ if env['WITH_BF_GAMEENGINE']:
 		defs.append('USE_SUMO_SOLID')
 	
 if env['WITH_BF_FFMPEG']:
-    defs.append('WITH_FFMPEG')
-    incs += ' ' + env['BF_FFMPEG_INC']
+	defs.append('WITH_FFMPEG')
+	incs += ' ' + env['BF_FFMPEG_INC']
 
 if env['WITH_BF_OGG']:
-    defs.append('WITH_OGG')
+	defs.append('WITH_OGG')
 
 if env['OURPLATFORM'] in ('win32-vc', 'win32-mingw', 'linuxcross'):
-    incs += ' ' + env['BF_PTHREADS_INC']
+	incs += ' ' + env['BF_PTHREADS_INC']
 
 if env['WITH_BF_VERSE']:
-    defs.append('WITH_VERSE')
-    incs += ' ' + env['BF_VERSE_INCLUDE']
+	defs.append('WITH_VERSE')
+	incs += ' ' + env['BF_VERSE_INCLUDE']
 
 # TODO buildinfo
 if env['BF_BUILDINFO']:
-    defs.append('NAN_BUILDINFO')
+	defs.append('NAN_BUILDINFO')
 
 if env['BF_NO_ELBEEM']:
-    defs.append('DISABLE_ELBEEM')
+	defs.append('DISABLE_ELBEEM')
 
 if env['WITH_BF_SDL']:
-    incs += ' ' + env['BF_SDL_INC']
+	incs += ' ' + env['BF_SDL_INC']
 else:
-    defs.append('DISABLE_SDL')
+	defs.append('DISABLE_SDL')
 
 if env['WITH_BF_BULLET']:
-    defs.append('WITH_BULLET')
+	defs.append('WITH_BULLET')
 
 if env['BF_SPLIT_SRC'] and (env['OURPLATFORM'] == 'win32-mingw'): 	 
 	for i in range(numlibs): 	 
diff --git a/source/creator/SConscript b/source/creator/SConscript
index 505b69b8e6d..1aed0de370e 100644
--- a/source/creator/SConscript
+++ b/source/creator/SConscript
@@ -12,22 +12,24 @@ incs += ' ' + env['BF_OPENGL_INC']
 
 defs = []
 if env['WITH_BF_QUICKTIME']:
-    incs += ' ' + env['BF_QUICKTIME_INC']
-    defs.append('WITH_QUICKTIME')
+	incs += ' ' + env['BF_QUICKTIME_INC']
+	defs.append('WITH_QUICKTIME')
 
 if env['WITH_BF_BINRELOC']:
-    incs += ' ../../extern/binreloc/include'
-    defs.append('WITH_BINRELOC')
+	incs += ' ../../extern/binreloc/include'
+	defs.append('WITH_BINRELOC')
 
 if env['WITH_BF_OPENEXR']:
-    defs.append('WITH_OPENEXR')
+	defs.append('WITH_OPENEXR')
 
 if not env['WITH_BF_SDL']:
 	defs.append('DISABLE_SDL')
 
 if env['WITH_BF_PYTHON']:
-    incs += ' ../blender/python'
+	incs += ' ../blender/python'
+	if env['BF_DEBUG']:
+		defs.append('_DEBUG')
 else:
-    defs.append('DISABLE_PYTHON')
+	defs.append('DISABLE_PYTHON')
 
 env.BlenderLib ( libname = 'blender_creator', sources = Split(sources), includes = Split(incs), defines = defs, libtype='core', priority = 1 )