diff --git a/src/settings/plugins/ifupdown/interface_parser.c b/src/settings/plugins/ifupdown/interface_parser.c
index 4635db2ca1..9be853a4cf 100644
--- a/src/settings/plugins/ifupdown/interface_parser.c
+++ b/src/settings/plugins/ifupdown/interface_parser.c
@@ -51,6 +51,7 @@ void add_block(const char *type, const char* name)
 void add_data(const char *key,const char *data)
 {
 	if_data *ret;
+	char *idx;
 
 	// Check if there is a block where we can attach our data
 	if (first == NULL)
@@ -58,6 +59,11 @@ void add_data(const char *key,const char *data)
 
 	ret = (if_data*) calloc(1,sizeof(struct _if_data));
 	ret->key = g_strdup(key);
+	// Normalize keys. Convert '_' to '-', as ifupdown accepts both variants.
+	// When querying keys via ifparser_getkey(), use '-'.
+	while ((idx = strrchr(ret->key, '_'))) {
+		*idx = '-';
+	}
 	ret->data = g_strdup(data);
 
 	if (last->info == NULL)
diff --git a/src/settings/plugins/ifupdown/plugin.c b/src/settings/plugins/ifupdown/plugin.c
index 01de78b384..bd889b31a1 100644
--- a/src/settings/plugins/ifupdown/plugin.c
+++ b/src/settings/plugins/ifupdown/plugin.c
@@ -366,7 +366,7 @@ SCPluginIfupdown_init (NMSystemConfigInterface *config)
 			/* Bridge configuration */
 			if(!strncmp ("br", block->name, 2)) {
 				/* Try to find bridge ports */
-				const char *ports = ifparser_getkey (block, "bridge_ports");
+				const char *ports = ifparser_getkey (block, "bridge-ports");
 				if (ports) {
 					int i;
 					int state = 0;