diff --git a/MdeModulePkg/Universal/SmbiosMeasurementDxe/SmbiosMeasurementDxe.c b/MdeModulePkg/Universal/SmbiosMeasurementDxe/SmbiosMeasurementDxe.c
index 5aafabfced..f9e0196677 100644
--- a/MdeModulePkg/Universal/SmbiosMeasurementDxe/SmbiosMeasurementDxe.c
+++ b/MdeModulePkg/Universal/SmbiosMeasurementDxe/SmbiosMeasurementDxe.c
@@ -286,6 +286,7 @@ FilterSmbiosEntry (
           if (StringId != 0) {
             // set ' ' for string field
             String = GetSmbiosStringById (TableEntry, StringId, &StringLen);
+            ASSERT (String != NULL);
             //DEBUG ((EFI_D_INFO,"StrId(0x%x)-%a(%d)\n", StringId, String, StringLen));
             SetMem (String, StringLen, ' ');
           }