diff --git a/DroidFishApp/src/main/java/org/petero/droidfish/gamelogic/GameTree.java b/DroidFishApp/src/main/java/org/petero/droidfish/gamelogic/GameTree.java
index e424279..21434cf 100644
--- a/DroidFishApp/src/main/java/org/petero/droidfish/gamelogic/GameTree.java
+++ b/DroidFishApp/src/main/java/org/petero/droidfish/gamelogic/GameTree.java
@@ -1413,7 +1413,7 @@ public class GameTree {
         }
 
         private static Pair<String, String> extractExtInfo(String comment, String cmd) {
-            comment = comment.replaceAll("\n|\r|\t", " ");
+            comment = comment.replaceAll("[\n\r\t]", " ");
             String remaining = comment;
             String param = null;
             String match = "[%" + cmd + " ";