diff --git a/build/config.mk b/build/config.mk
index 67f33a9f..e5396301 100644
--- a/build/config.mk
+++ b/build/config.mk
@@ -95,9 +95,9 @@ else
 endif
 
 ifeq ($(PROC),ppc)
-    CONFIG_CFLAGS += -DWORDS_BIGENDIAN=1
+    CONFIG_CFLAGS += -DWORDS_BIGENDIAN=1 -DCPU_IS_LITTLE_ENDIAN=0
 else
-    CONFIG_CFLAGS += -DWORDS_BIGENDIAN=0
+    CONFIG_CFLAGS += -DWORDS_BIGENDIAN=0 -DCPU_IS_LITTLE_ENDIAN=1
 endif
 
 ifeq ($(OS),Linux)