diff --git a/vlib/os/os.v b/vlib/os/os.v
index bfdc2130dc..79f5dde8cc 100644
--- a/vlib/os/os.v
+++ b/vlib/os/os.v
@@ -171,7 +171,7 @@ pub fn cp(old, new string) ?bool {
 		if fp_from < 0 { // Check if file opened
 			return error_with_code('cp: failed to open $old', int(fp_from))
 		}
-		fp_to := C.open(new.str, C.O_WRONLY | C.O_CREAT | C.O_TRUNC)
+		fp_to := C.open(new.str, C.O_WRONLY | C.O_CREAT | C.O_TRUNC, C.S_IWUSR | C.S_IRUSR)
 		if fp_to < 0 { // Check if file opened (permissions problems ...)
 			C.close(fp_from)
 			return error_with_code('cp: failed to write to $new', int(fp_to))