diff --git a/cmds/atrace/Android.mk b/cmds/atrace/Android.mk
index df79e82..1de8e95 100644
--- a/cmds/atrace/Android.mk
+++ b/cmds/atrace/Android.mk
@@ -6,6 +6,7 @@
 LOCAL_SRC_FILES:= atrace.c
 
 LOCAL_C_INCLUDES += external/zlib
+LOCAL_CFLAGS += -std=c99
 
 LOCAL_MODULE:= atrace