diff --git a/src/vlib/pci/pci.c b/src/vlib/pci/pci.c
index 0bc90c5..7284e66 100644
--- a/src/vlib/pci/pci.c
+++ b/src/vlib/pci/pci.c
@@ -119,7 +119,7 @@
 {
   const vlib_pci_config_reg_command_t cmd = { .intx_disable = 1 };
   clib_error_t *err;
-  int already_set;
+  int already_set = 0;
 
   err = _vlib_pci_config_set_control_bit (vm, h, cmd.as_u16, 0, &already_set);
   log_debug (h, "interrupt%senabled", already_set ? " " : " already ");
@@ -131,7 +131,7 @@
 {
   const vlib_pci_config_reg_command_t cmd = { .intx_disable = 1 };
   clib_error_t *err;
-  int already_set;
+  int already_set = 0;
 
   err = _vlib_pci_config_set_control_bit (vm, h, cmd.as_u16, 1, &already_set);
   log_debug (h, "interrupt%sdisabled", already_set ? " " : " already ");
@@ -143,7 +143,7 @@
 {
   const vlib_pci_config_reg_command_t cmd = { .bus_master = 1 };
   clib_error_t *err;
-  int already_set;
+  int already_set = 0;
 
   err = _vlib_pci_config_set_control_bit (vm, h, cmd.as_u16, 1, &already_set);
   log_debug (h, "bus-master%senabled", already_set ? " " : " already ");
@@ -155,7 +155,7 @@
 {
   const vlib_pci_config_reg_command_t cmd = { .bus_master = 1 };
   clib_error_t *err;
-  int already_set;
+  int already_set = 0;
 
   err = _vlib_pci_config_set_control_bit (vm, h, cmd.as_u16, 0, &already_set);
   log_debug (h, "bus-master%sdisabled", already_set ? " " : " already ");