diff --git a/source/blender/blenkernel/SConscript b/source/blender/blenkernel/SConscript
index 6772cccbda6..261d5ee1471 100644
--- a/source/blender/blenkernel/SConscript
+++ b/source/blender/blenkernel/SConscript
@@ -52,7 +52,7 @@ if env['WITH_BF_QUICKTIME']:
 	incs += ' ' + env['BF_QUICKTIME_INC']
 
 if env['WITH_BF_BULLET']:
-	defs.append('WITH_BULLET')
+	defs.append('USE_BULLET')
 
 if env['BF_NO_ELBEEM']:
 	defs.append('DISABLE_ELBEEM')
diff --git a/source/nan_compile.mk b/source/nan_compile.mk
index 4a4e472fa66..c62b4f2681b 100644
--- a/source/nan_compile.mk
+++ b/source/nan_compile.mk
@@ -40,8 +40,8 @@ CPPFLAGS ?= $(NAN_CPPFLAGS)
 ifneq ($(NAN_NO_KETSJI), true)
     CFLAGS  += -DGAMEBLENDER=1
     ifeq ($(NAN_USE_BULLET), true)
-      CFLAGS  += -DUSE_BULLET -DWITH_BULLET
-      CCFLAGS += -DUSE_BULLET -DWITH_BULLET
+      CFLAGS  += -DUSE_BULLET
+      CCFLAGS += -DUSE_BULLET
     endif
 else
    CPPFLAGS += -DNO_KETSJI