diff --git a/src/build/Common.gmake b/src/build/Common.gmake
index c4e6d0cabda6677e887ef9f81ec998545c301411..1fa4ac498a0f5f85b108fc6f567d8aa4a94ca908 100644
--- a/src/build/Common.gmake
+++ b/src/build/Common.gmake
@@ -323,7 +323,7 @@ ifdef DEBUG
  CFLAGS	+=	-ggdb
  CFLAGS	+=	-D_DEBUG
 else # RELEASE
- CFLAGS	:= -O3 $(CFLAGS)
+ CFLAGS	:= -O2 $(CFLAGS)
 endif
 
 -include targets.mk