diff --git a/PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf b/PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
index ca136a0020..bed1d37252 100644
--- a/PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
+++ b/PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
@@ -42,6 +42,7 @@
   PciHostBridge.c
   PciRootBridgeIo.c
   PciHostBridge.h
+  IoFifo.h
 
 [Sources.IA32]
   Ia32/IoFifo.asm