diff --git a/intern/guardedalloc/intern/mallocn.c b/intern/guardedalloc/intern/mallocn.c
index e682f17a386..d26e39e5bcc 100644
--- a/intern/guardedalloc/intern/mallocn.c
+++ b/intern/guardedalloc/intern/mallocn.c
@@ -259,8 +259,13 @@ void *MEM_mapallocN(unsigned int len, const char *str)
 	
 	len = (len + 3 ) & ~3; 	/* allocate in units of 4 */
 	
+#if defined(__sgi)
+	memh= mmap(0, len+sizeof(MemHead)+sizeof(MemTail), 
+			   PROT_READ|PROT_WRITE, MAP_SHARED, -1, 0);
+#else
 	memh= mmap(0, len+sizeof(MemHead)+sizeof(MemTail), 
 			   PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANON, -1, 0);
+#endif
 	
 	if(memh!=(MemHead *)-1) {
 		make_memhead_header(memh, len, str);
diff --git a/source/blender/src/writemovie.c b/source/blender/src/writemovie.c
index 3491f4f0f60..2d828f1213b 100644
--- a/source/blender/src/writemovie.c
+++ b/source/blender/src/writemovie.c
@@ -30,7 +30,8 @@
  * ***** END GPL/BL DUAL LICENSE BLOCK *****
  */
 
-#ifdef __sgi
+//#ifdef __sgi
+#if 0
 
 #include <unistd.h>
 #include <movie.h>
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLRasterizer/RAS_GLExtensionManager.h b/source/gameengine/Rasterizer/RAS_OpenGLRasterizer/RAS_GLExtensionManager.h
index 00d1d0c9d05..26217c1d78e 100644
--- a/source/gameengine/Rasterizer/RAS_OpenGLRasterizer/RAS_GLExtensionManager.h
+++ b/source/gameengine/Rasterizer/RAS_OpenGLRasterizer/RAS_GLExtensionManager.h
@@ -52,6 +52,10 @@
 #  undef __glext_h_
 #endif
 
+#ifdef __sgi
+#  undef GL_ARB_vertex_program
+#endif
+
 #include "glext.h"
 
 #include "EXT_separate_specular_color.h"
diff --git a/source/nan_compile.mk b/source/nan_compile.mk
index 1201d3e546e..736a3c56ec8 100644
--- a/source/nan_compile.mk
+++ b/source/nan_compile.mk
@@ -117,7 +117,11 @@ ifeq ($(OS),irix)
     CCC	= CC
     CFLAGS	+= -n32 -mips3 -Xcpluscomm
     CCFLAGS	+= -n32 -mips3 -Xcpluscomm -LANG:std
+ifdef MIPS73_ISOHEADERS
     CCFLAGS	+= -LANG:libc_in_namespace_std=off -I$(MIPS73_ISOHEADERS)
+else
+    CCFLAGS	+= -LANG:libc_in_namespace_std=off
+endif
     REL_CFLAGS	+= -n32 -mips3 -O2 -OPT:Olimit=0
     REL_CCFLAGS += -n32 -mips3 -O2 -OPT:Olimit=0
     OPENGL_HEADERS = /usr/include