diff --git a/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c b/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c
index e122ae1699..bf221768c8 100644
--- a/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c
+++ b/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c
@@ -1277,6 +1277,8 @@ PcRtcAcpiTableChangeCallback (
     return;
   }
 
+  ASSERT (Rsdp != NULL);
+
   //
   // Find FADT in XSDT
   //