diff --git a/package/sudo/sudo.mk b/package/sudo/sudo.mk
index 2b9ba76a51..4f9fdb4b2c 100644
--- a/package/sudo/sudo.mk
+++ b/package/sudo/sudo.mk
@@ -80,7 +80,7 @@ define SUDO_USERS
 endef
 
 define SUDO_ENABLE_SUDO_GROUP_RULE
-	$(SED) '/^# \%sudo\tALL=(ALL) ALL/s/^# //' $(TARGET_DIR)/etc/sudoers
+	$(SED) '/^# \%sudo\tALL=(ALL:ALL) ALL/s/^# //' $(TARGET_DIR)/etc/sudoers
 endef
 SUDO_POST_INSTALL_TARGET_HOOKS += SUDO_ENABLE_SUDO_GROUP_RULE