diff --git a/bbswitch.c b/bbswitch.c
index fa4ed2f..f3c86f0 100644
--- a/bbswitch.c
+++ b/bbswitch.c
@@ -287,7 +287,7 @@ static void bbswitch_on(void) {
         return;
 
     pr_info("enabling discrete graphics\n");
-
+    pci_bridge_secondary_bus_reset(dis_dev);
     if (bbswitch_acpi_on())
         pr_warn("The discrete card could not be enabled by a _DSM call\n");