diff --git a/OvmfPkg/Bhyve/PlatformPei/Platform.c b/OvmfPkg/Bhyve/PlatformPei/Platform.c
index d980e3fcb0..c23b906733 100644
--- a/OvmfPkg/Bhyve/PlatformPei/Platform.c
+++ b/OvmfPkg/Bhyve/PlatformPei/Platform.c
@@ -191,7 +191,7 @@ MemMapInitialization (
       ASSERT (PciExBarBase <= MAX_UINT32 - SIZE_256MB);
       PciBase = (UINT32)(PciExBarBase + SIZE_256MB);
     } else {
-      PciBase = PcdGet64 (PcdPciMmio32Base);
+      PciBase = (UINT32)PcdGet64 (PcdPciMmio32Base);
       if (PciBase == 0)
         PciBase = (TopOfLowRam < BASE_2GB) ? BASE_2GB : TopOfLowRam;
     }