diff --git a/build/osx/wxcarbon.xcconfig b/build/osx/wxcarbon.xcconfig
index 66484a823a..b2daf61648 100644
--- a/build/osx/wxcarbon.xcconfig
+++ b/build/osx/wxcarbon.xcconfig
@@ -7,6 +7,7 @@ MACOSX_DEPLOYMENT_TARGET = 10.5
 SDKROOT = macosx
 
 GCC_VERSION = 4.2
+GCC_VERSION[arch=ppc] = 4.0
 
 ARCHS = ppc i386