diff --git a/compat/mingw.c b/compat/mingw.c
index c57d699dd0..544335d927 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -1602,7 +1602,10 @@ static int try_shell_exec(const char *cmd, char *const *argv)
 	prog = path_lookup(interpr, path, 1);
 	if (prog) {
 		int argc = 0;
-		const char **argv2;
+#ifndef _MSC_VER
+		const
+#endif
+		char **argv2;
 		while (argv[argc]) argc++;
 		ALLOC_ARRAY(argv2, argc + 1);
 		argv2[0] = (char *)cmd;	/* full path to the script file */