diff --git a/hadoop-mapreduce-project/CHANGES.txt b/hadoop-mapreduce-project/CHANGES.txt
index 91ffd6c1c2..1f74eb5400 100644
--- a/hadoop-mapreduce-project/CHANGES.txt
+++ b/hadoop-mapreduce-project/CHANGES.txt
@@ -52,6 +52,9 @@ Trunk (unreleased changes)
 
   BUG FIXES
 
+    MAPREDUCE-4149. [Rumen] Rumen fails to parse certain counter
+                    strings. (ravigummadi)
+
     MAPREDUCE-4083. [Gridmix] NPE in cpu emulation. (amarrk)
 
     MAPREDUCE-4087. [Gridmix] GenerateDistCacheData job of Gridmix can
diff --git a/hadoop-tools/hadoop-rumen/src/main/java/org/apache/hadoop/tools/rumen/HistoryEventEmitter.java b/hadoop-tools/hadoop-rumen/src/main/java/org/apache/hadoop/tools/rumen/HistoryEventEmitter.java
index a8a7fcbed0..2103709f54 100644
--- a/hadoop-tools/hadoop-rumen/src/main/java/org/apache/hadoop/tools/rumen/HistoryEventEmitter.java
+++ b/hadoop-tools/hadoop-rumen/src/main/java/org/apache/hadoop/tools/rumen/HistoryEventEmitter.java
@@ -80,6 +80,8 @@ protected static Counters parseCounters(String counters)
     }
 
     counters = counters.replace("\\.", "\\\\.");
+    counters = counters.replace("\\\\{", "\\{");
+    counters = counters.replace("\\\\}", "\\}");
     counters = counters.replace("\\\\(", "\\(");
     counters = counters.replace("\\\\)", "\\)");
     counters = counters.replace("\\\\[", "\\[");