diff --git a/src/include/switch_core_db.h b/src/include/switch_core_db.h
index ab5903b24a..0079dea569 100644
--- a/src/include/switch_core_db.h
+++ b/src/include/switch_core_db.h
@@ -539,7 +539,7 @@ SWITCH_DECLARE(int) switch_core_db_changes(switch_core_db_t *db);
  * should always use %q instead of %s when inserting text into a string 
  * literal.
  */
-SWITCH_DECLARE(char *) switch_mprintf(const char *zFormat, ...);
+SWITCH_DECLARE(char *) switch_mprintf(const char *zFormat, ...) PRINTF_FUNCTION(1, 2);
 
 SWITCH_END_EXTERN_C
 #endif