diff --git a/src/util/u_dynarray.h b/src/util/u_dynarray.h
index cc316323f28..dcbbc06d161 100644
--- a/src/util/u_dynarray.h
+++ b/src/util/u_dynarray.h
@@ -28,6 +28,7 @@
 #define U_DYNARRAY_H
 
 #include <stdlib.h>
+#include <string.h>
 #include "ralloc.h"
 
 #ifdef __cplusplus