diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 5db96d4304de76d276a2feb933044c3673cb0abe..1331fcf261433b72c9d0a4620326a3898f1761fa 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -646,7 +646,7 @@ int get_mp_bus_to_node(int busnum)
 
 #else /* CONFIG_X86_32 */
 
-static unsigned char mp_bus_to_node[BUS_NR] = {
+static int mp_bus_to_node[BUS_NR] = {
 	[0 ... BUS_NR - 1] = -1
 };