diff --git a/fs/smb/server/connection.c b/fs/smb/server/connection.c
index 487b5562c771..6cac48c8fbe8 100644
--- a/fs/smb/server/connection.c
+++ b/fs/smb/server/connection.c
@@ -297,7 +297,7 @@ bool ksmbd_conn_alive(struct ksmbd_conn *conn)
 
 /* "+2" for BCC field (ByteCount, 2 bytes) */
 #define SMB1_MIN_SUPPORTED_PDU_SIZE (sizeof(struct smb_hdr) + 2)
-#define SMB2_MIN_SUPPORTED_HEADER_SIZE (sizeof(struct smb2_hdr) + 4)
+#define SMB2_MIN_SUPPORTED_PDU_SIZE (sizeof(struct smb2_pdu))
 
 /**
  * ksmbd_conn_handler_loop() - session thread to listen on new smb requests
@@ -397,7 +397,7 @@ int ksmbd_conn_handler_loop(void *p)
 
 		if (((struct smb2_hdr *)smb_get_msg(conn->request_buf))->ProtocolId ==
 		    SMB2_PROTO_NUMBER) {
-			if (pdu_size < SMB2_MIN_SUPPORTED_HEADER_SIZE)
+			if (pdu_size < SMB2_MIN_SUPPORTED_PDU_SIZE)
 				break;
 		}