diff --git a/src/mesa/main/shaderapi.c b/src/mesa/main/shaderapi.c
index d824a88ca2f..2c11e4d5bb6 100644
--- a/src/mesa/main/shaderapi.c
+++ b/src/mesa/main/shaderapi.c
@@ -38,6 +38,7 @@
 
 
 #include <stdbool.h>
+#include <c99_alloca.h>
 #include "main/glheader.h"
 #include "main/context.h"
 #include "main/dispatch.h"