diff --git a/src/nm-ip4-config.c b/src/nm-ip4-config.c
index 9b9deeaf32..8ba1070913 100644
--- a/src/nm-ip4-config.c
+++ b/src/nm-ip4-config.c
@@ -137,6 +137,7 @@ nm_ip4_config_commit (NMIP4Config *config, int ifindex, int priority)
 		int count = nm_ip4_config_get_num_routes (config);
 		GArray *routes = g_array_sized_new (FALSE, FALSE, sizeof (NMPlatformIP4Route), count);
 		NMPlatformIP4Route route;
+		gboolean success;
 
 		for (i = 0; i < count; i++) {
 			memcpy (&route, nm_ip4_config_get_route (config, i), sizeof (route));
@@ -157,8 +158,10 @@ nm_ip4_config_commit (NMIP4Config *config, int ifindex, int priority)
 			g_array_append_val (routes, route);
 		}
 
-		nm_platform_ip4_route_sync (ifindex, routes);
+		success = nm_platform_ip4_route_sync (ifindex, routes);
 		g_array_unref (routes);
+		if (!success)
+			return FALSE;
 	}
 
 	/* MTU */
diff --git a/src/nm-ip6-config.c b/src/nm-ip6-config.c
index 8c49d95ee6..f6b48cca89 100644
--- a/src/nm-ip6-config.c
+++ b/src/nm-ip6-config.c
@@ -127,6 +127,7 @@ nm_ip6_config_commit (NMIP6Config *config, int ifindex, int priority)
 {
 	NMIP6ConfigPrivate *priv = NM_IP6_CONFIG_GET_PRIVATE (config);
 	int i;
+	gboolean success;
 
 	g_return_val_if_fail (ifindex > 0, FALSE);
 	g_return_val_if_fail (config != NULL, FALSE);
@@ -159,11 +160,11 @@ nm_ip6_config_commit (NMIP6Config *config, int ifindex, int priority)
 			g_array_append_val (routes, route);
 		}
 
-		nm_platform_ip6_route_sync (ifindex, routes);
+		success = nm_platform_ip6_route_sync (ifindex, routes);
 		g_array_unref (routes);
 	}
 
-	return TRUE;
+	return success;
 }
 
 static inline gboolean