diff --git a/src/c/error.d b/src/c/error.d
index 9668a21d6..a7c9eae65 100644
--- a/src/c/error.d
+++ b/src/c/error.d
@@ -14,7 +14,7 @@
     See file '../Copyright' for full details.
 */
 
-
+#include <string.h>
 #include <errno.h>
 #include <signal.h>
 #include "ecl.h"