diff --git a/adb/adb_utils.h b/adb/adb_utils.h
index f764a0eea7fbfb63763d1e76e3ec9ea55153c5e8..f6ce8e2420f14335b892148e6869276034de60a1 100644
--- a/adb/adb_utils.h
+++ b/adb/adb_utils.h
@@ -24,7 +24,7 @@
 
 #include <android-base/macros.h>
 
-int syntax_error(const char*, ...);
+int syntax_error(const char*, ...) __attribute__((__format__(__printf__, 1, 2)));
 
 void close_stdin();