diff --git a/strings/strmake.c b/strings/strmake.c
index 05b5878d99c..df8d78e8476 100644
--- a/strings/strmake.c
+++ b/strings/strmake.c
@@ -27,7 +27,7 @@
 #include <my_global.h>
 #include "m_string.h"
 
-char *strmake(register char *dst, register const char *src, uint length)
+char *strmake(register char *dst, register const char *src, size_t length)
 {
 #ifdef EXTRA_DEBUG
   /*