diff --git a/drivers/filters/mountmgr/device.c b/drivers/filters/mountmgr/device.c
index 8ed81e327d0..4f3f9d2974e 100644
--- a/drivers/filters/mountmgr/device.c
+++ b/drivers/filters/mountmgr/device.c
@@ -393,7 +393,7 @@ IsFtVolume(IN PUNICODE_STRING SymbolicName)
     }
 
     /* Check if this is a FT volume */
-    return IsRecognizedPartition(PartitionInfo.PartitionType);
+    return IsFTPartition(PartitionInfo.PartitionType);
 }
 
 /*