diff --git a/reactos/ntoskrnl/wmi/smbios.c b/reactos/ntoskrnl/wmi/smbios.c
index e650bb24db9..bea8b9e27c2 100644
--- a/reactos/ntoskrnl/wmi/smbios.c
+++ b/reactos/ntoskrnl/wmi/smbios.c
@@ -196,6 +196,7 @@ WmipGetRawSMBiosTableData(
         TableMapping = MmMapIoSpace(PhysicalAddress, TableSize, MmCached);
         if (TableMapping == NULL)
         {
+            ExFreePoolWithTag(BiosTables, 'BTMS');
             return STATUS_UNSUCCESSFUL;
         }