diff --git a/xconv.c b/xconv.c
index a6c6aad..5d6c7f8 100644
--- a/xconv.c
+++ b/xconv.c
@@ -12,7 +12,7 @@
 static int
 Xconv_Cmd(Jim_Interp *j, int argc, Jim_Obj *const argv[])
 {
-	const char *src, *dst;
+	char *src, *dst;
 	size_t dstlen, len;
 	Jim_Obj *ret;
 
@@ -22,7 +22,7 @@ Xconv_Cmd(Jim_Interp *j, int argc, Jim_Obj *const argv[])
 		return JIM_ERR;
 	}
 
-	src = Jim_GetString(argv[1], NULL);
+	src = (char *)Jim_GetString(argv[1], NULL);
 	dstlen = strlen(src) * 2;
 	dst = (char *)Jim_Alloc(dstlen + 1);