diff --git a/arch/x86/pci/mmconfig-shared.c b/arch/x86/pci/mmconfig-shared.c
index 81d3466765ca7..b707a0141d3b3 100644
--- a/arch/x86/pci/mmconfig-shared.c
+++ b/arch/x86/pci/mmconfig-shared.c
@@ -18,7 +18,7 @@
 #include <asm/e820.h>
 #include <asm/pci_x86.h>
 
-#define PREFIX "ACPI: "
+#define PREFIX "PCI: "
 
 /* aperture is up to 256MB but BIOS may reserve less */
 #define MMCONFIG_APER_MIN	(2 * 1024*1024)