diff --git a/Makefile b/Makefile
index 2ed9af8e..4aa9f519 100644
--- a/Makefile
+++ b/Makefile
@@ -419,7 +419,7 @@ ifeq ($(PLATFORM),darwin)
   LIBS = -framework Cocoa
   CLIENT_LIBS=
   RENDERER_LIBS=
-  OPTIMIZEVM=
+  OPTIMIZEVM = -O3
 
   # Default minimum Mac OS X version
   ifeq ($(MACOSX_VERSION_MIN),)
@@ -435,7 +435,6 @@ ifeq ($(PLATFORM),darwin)
 
   ifeq ($(ARCH),ppc)
     BASE_CFLAGS += -arch ppc -faltivec
-    OPTIMIZEVM += -O3
   endif
   ifeq ($(ARCH),ppc64)
     BASE_CFLAGS += -arch ppc64 -faltivec
diff --git a/make-macosx-ub.sh b/make-macosx-ub.sh
index c7419ecb..997c9f42 100755
--- a/make-macosx-ub.sh
+++ b/make-macosx-ub.sh
@@ -19,7 +19,7 @@ unset X86_64_MACOSX_VERSION_MIN
 unset X86_SDK
 unset X86_CFLAGS
 unset X86_MACOSX_VERSION_MIN
-unset PPC_64_SDK
+unset PPC_SDK
 unset PPC_CFLAGS
 unset PPC_MACOSX_VERSION_MIN