diff --git a/vm/Config.linux.ppc.32 b/vm/Config.linux.ppc.32
index 87a197cd9f..693663de9b 100644
--- a/vm/Config.linux.ppc.32
+++ b/vm/Config.linux.ppc.32
@@ -1,3 +1,3 @@
 include vm/Config.linux
 PLAF_DLL_OBJS += vm/cpu-ppc.linux.o
-CFLAGS += -m32
+SITE_CFLAGS += -m32
diff --git a/vm/Config.linux.ppc.64 b/vm/Config.linux.ppc.64
index f87195ee7c..d910060ecb 100644
--- a/vm/Config.linux.ppc.64
+++ b/vm/Config.linux.ppc.64
@@ -1,3 +1,3 @@
 include vm/Config.linux
 PLAF_DLL_OBJS += vm/cpu-ppc.linux.o
-CFLAGS += -m64
+SITE_CFLAGS += -m64
diff --git a/vm/Config.macosx.x86.32 b/vm/Config.macosx.x86.32
index f983fff32b..5c0d4e0ede 100644
--- a/vm/Config.macosx.x86.32
+++ b/vm/Config.macosx.x86.32
@@ -1,3 +1,2 @@
 include vm/Config.macosx
 include vm/Config.x86.32
-CFLAGS += -m32
diff --git a/vm/Config.macosx.x86.64 b/vm/Config.macosx.x86.64
index 7ef5f89559..f987a55694 100644
--- a/vm/Config.macosx.x86.64
+++ b/vm/Config.macosx.x86.64
@@ -1,3 +1,2 @@
 include vm/Config.macosx
 include vm/Config.x86.64
-CFLAGS += -m64
diff --git a/vm/Config.x86.32 b/vm/Config.x86.32
index 7bc404084a..2a55336d56 100644
--- a/vm/Config.x86.32
+++ b/vm/Config.x86.32
@@ -1,3 +1,3 @@
 PLAF_DLL_OBJS += vm/cpu-x86.o
 PLAF_MASTER_HEADERS += vm/cpu-x86.hpp
-
+SITE_CFLAGS += -m32
diff --git a/vm/Config.x86.64 b/vm/Config.x86.64
index 7bc404084a..2d9efa40f3 100644
--- a/vm/Config.x86.64
+++ b/vm/Config.x86.64
@@ -1,3 +1,3 @@
 PLAF_DLL_OBJS += vm/cpu-x86.o
 PLAF_MASTER_HEADERS += vm/cpu-x86.hpp
-
+SITE_CFLAGS=-m64