diff --git a/src/engine/kvp_frame.c b/src/engine/kvp_frame.c
index 8bc803b8f0..cd08a3f7fb 100644
--- a/src/engine/kvp_frame.c
+++ b/src/engine/kvp_frame.c
@@ -26,6 +26,7 @@
 
 #define _GNU_SOURCE
 #include <glib.h>
+#include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <math.h>