diff --git a/src/mesa/glapi/glthread.c b/src/mesa/glapi/glthread.c
index 813d6f9dbc2..b818f4e26eb 100644
--- a/src/mesa/glapi/glthread.c
+++ b/src/mesa/glapi/glthread.c
@@ -34,6 +34,7 @@
 #endif
 
 #include <stdlib.h>
+#include <stdio.h>
 #include "glthread.h"