diff --git a/ggml-opencl.c b/ggml-opencl.c
index 90ebe4867..d06c2566e 100644
--- a/ggml-opencl.c
+++ b/ggml-opencl.c
@@ -5,6 +5,7 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <stdlib.h>
 
 #include "ggml.h"