diff --git a/lib/sendf.c b/lib/sendf.c
index 43163e61f..53a0a4e6a 100644
--- a/lib/sendf.c
+++ b/lib/sendf.c
@@ -53,6 +53,7 @@
 #endif
 #include <string.h>
 #include "memory.h"
+#include "strerror.h"
 /* The last #include file should be: */
 #include "memdebug.h"