diff --git a/src/video/cocoa/SDL_cocoamessagebox.m b/src/video/cocoa/SDL_cocoamessagebox.m
index 752dea0b3..ec4c55f61 100644
--- a/src/video/cocoa/SDL_cocoamessagebox.m
+++ b/src/video/cocoa/SDL_cocoamessagebox.m
@@ -22,7 +22,7 @@
 
 #if SDL_VIDEO_DRIVER_COCOA
 
-#if defined(__APPLE__) && defined(__POWERPC__)
+#if defined(__APPLE__) && defined(__POWERPC__) && !defined(__APPLE_ALTIVEC__)
 #include <altivec.h>
 #undef bool
 #undef vector
diff --git a/src/video/cocoa/SDL_cocoavideo.m b/src/video/cocoa/SDL_cocoavideo.m
index 30e03f098..6502a3fd7 100644
--- a/src/video/cocoa/SDL_cocoavideo.m
+++ b/src/video/cocoa/SDL_cocoavideo.m
@@ -22,7 +22,7 @@
 
 #if SDL_VIDEO_DRIVER_COCOA
 
-#if defined(__APPLE__) && defined(__POWERPC__)
+#if defined(__APPLE__) && defined(__POWERPC__) && !defined(__APPLE_ALTIVEC__)
 #include <altivec.h>
 #undef bool
 #undef vector