diff --git a/Makefile b/Makefile
index a568886..5ecf5f1 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ include mkenv.mk
 include magic.mk
 
 CFLAGS = -march=armv5te -mfloat-abi=soft -Wall \
-	 -O0 -ggdb -Iinclude
+	 -Os -ggdb -Iinclude
 
 LDFLAGS = --nostdlib -T fernvale.ld
 LIBS =
diff --git a/bionic.c b/bionic.c
index c4b8b9d..96f09b6 100644
--- a/bionic.c
+++ b/bionic.c
@@ -685,6 +685,11 @@ void _memset(void *dst0, char val, size_t length)
 		*ptr++ = val;
 }
 
+void __aeabi_memset(void *dst0, char val, size_t length)
+{
+	_memset(dst0, val, length);
+}
+
 int _strlen(const char *s)
 {
 	int i = 0;