diff --git a/package/sudo/sudo.mk b/package/sudo/sudo.mk
index 4e1405eaf1..f57a86805a 100644
--- a/package/sudo/sudo.mk
+++ b/package/sudo/sudo.mk
@@ -73,7 +73,7 @@ define SUDO_USERS
 endef
 
 define SUDO_ENABLE_SUDO_GROUP_RULE
-	$(SED) '/^# \%sudo\tALL=(ALL:ALL) ALL/s/^# //' $(TARGET_DIR)/etc/sudoers
+	$(SED) '/^# \%sudo ALL=(ALL:ALL) ALL/s/^# //' $(TARGET_DIR)/etc/sudoers
 endef
 SUDO_POST_INSTALL_TARGET_HOOKS += SUDO_ENABLE_SUDO_GROUP_RULE