diff --git a/small_utils/mstfwreset.py b/small_utils/mstfwreset.py
index 74504782..55613b2b 100644
--- a/small_utils/mstfwreset.py
+++ b/small_utils/mstfwreset.py
@@ -1764,6 +1764,11 @@ def reset_flow_host(device, args, command):
         if psid in ["MT_0000000891", "MT_0000000929", "MT_0000000937"]:
             raise RuntimeError("Cedar device is not supported")
 
+    # Block BF2/BF3
+    devDict = getDeviceDict(devid)
+    if devDict['name'] in ['BlueField2', 'BlueField3']:
+        raise RuntimeError("%s device is not supported" % devDict['name'])
+
     # Check if other process is accessing the device (burning the device)
     # Supported on Windows OS only
     if platform.system() == "Windows":