diff --git a/src/nm-ip4-config.c b/src/nm-ip4-config.c
index 1c06a42ce9..03467be93d 100644
--- a/src/nm-ip4-config.c
+++ b/src/nm-ip4-config.c
@@ -191,7 +191,9 @@ _nm_ip_config_add_obj (NMDedupMultiIndex *multi_idx,
 	if (!nm_dedup_multi_index_add_full (multi_idx,
 	                                    &idx_type->parent,
 	                                    obj_new,
-	                                    NM_DEDUP_MULTI_IDX_MODE_APPEND,
+	                                      append_force
+	                                    ? NM_DEDUP_MULTI_IDX_MODE_APPEND_FORCE
+	                                    : NM_DEDUP_MULTI_IDX_MODE_APPEND,
 	                                    NULL,
 	                                    entry_old ?: NM_DEDUP_MULTI_ENTRY_MISSING,
 	                                    NULL,
diff --git a/src/tests/test-ip4-config.c b/src/tests/test-ip4-config.c
index 35fa9e9322..a4fbd11bc0 100644
--- a/src/tests/test-ip4-config.c
+++ b/src/tests/test-ip4-config.c
@@ -113,9 +113,7 @@ test_replace (void)
 
 	g_assert (nm_ip4_config_replace (config2, config1, &relevant_changes));
 	g_assert (relevant_changes);
-
-	 /* FIXME: this currently fails due to a bug in replace() */
-	g_assert (!nm_ip4_config_equal (config1, config2));
+	g_assert (nm_ip4_config_equal (config1, config2));
 }
 
 static void