diff --git a/packages/toolchain/devel/eglibc/build b/packages/toolchain/devel/eglibc/build
index fa8ddf206c..00bd86e9ae 100755
--- a/packages/toolchain/devel/eglibc/build
+++ b/packages/toolchain/devel/eglibc/build
@@ -7,7 +7,7 @@ $SCRIPTS/install gcc-core
 export BUILD_CC=$HOST_CC
 export OBJDUMP_FOR_HOST=objdump
 
-CFLAGS="-O3 -fno-stack-protector"
+CFLAGS="-Os -fno-stack-protector"
 
 # eglibc fails to compile with GCC 4.5.0's link time optimization.
   LDFLAGS=`echo $LDFLAGS | sed -e "s|-flto||" -e "s|-fuse-linker-plugin||" -e "s|-fwhole-program||" -e "s|-fuse-ld=gold||"`