diff --git a/source/smbd/reply.c b/source/smbd/reply.c
index 46653cd..5cd8633 100644
--- a/source/smbd/reply.c
+++ b/source/smbd/reply.c
@@ -3210,14 +3210,20 @@ static void send_file_readX(connection_struct *conn, struct smb_request *req,
 		return;
 	}
 
-	if (startpos > sbuf.st_size) {
-		smb_maxcnt = 0;
-	} else if (smb_maxcnt > (sbuf.st_size - startpos)) {
-		smb_maxcnt = (sbuf.st_size - startpos);
-	}
+	if (S_ISREG(sbuf.st_mode)) {
+		/* Only change the client values for a normal file. */
+		if (startpos > sbuf.st_size) {
+			smb_maxcnt = 0;
+		} else if (smb_maxcnt > (sbuf.st_size - startpos)) {
+			smb_maxcnt = (sbuf.st_size - startpos);
+		}
 
-	if (smb_maxcnt == 0) {
-		goto normal_read;
+		if (smb_maxcnt == 0) {
+			goto normal_read;
+		}
+	} else {
+		/* Pipe or device read. */
+		goto normal_nosendfile_read;
 	}
 
 #if defined(WITH_SENDFILE)
@@ -3311,25 +3317,27 @@ normal_read:
 		}
 		TALLOC_FREE(req->outbuf);
 		return;
-	} else {
-		reply_outbuf(req, 12, smb_maxcnt);
-
-		nread = read_file(fsp, smb_buf(req->outbuf), startpos,
-				  smb_maxcnt);
-		if (nread < 0) {
-			reply_unixerror(req, ERRDOS, ERRnoaccess);
-			return;
-		}
-
-		setup_readX_header((char *)req->outbuf, nread);
+	}
 
-		DEBUG( 3, ( "send_file_readX fnum=%d max=%d nread=%d\n",
-			fsp->fnum, (int)smb_maxcnt, (int)nread ) );
+normal_nosendfile_read:
 
-		chain_reply(req);
+	reply_outbuf(req, 12, smb_maxcnt);
 
+	nread = read_file(fsp, smb_buf(req->outbuf), startpos,
+			  smb_maxcnt);
+	if (nread < 0) {
+		reply_unixerror(req, ERRDOS, ERRnoaccess);
 		return;
 	}
+
+	setup_readX_header((char *)req->outbuf, nread);
+
+	DEBUG( 3, ( "send_file_readX fnum=%d max=%d nread=%d\n",
+		fsp->fnum, (int)smb_maxcnt, (int)nread ) );
+
+	chain_reply(req);
+
+	return;
 }
 
 /****************************************************************************