diff --git a/CHANGES.txt b/CHANGES.txt
index 75565a8..8965aaa 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -59,6 +59,8 @@
  
 BUG FIXES
 
+PIG-5063: e2e IOErrors_1 on mapreduce is unstable (knoguchi)
+
 PIG-5062: Allow Native e2e tests to run in parallel (knoguchi)
 
 PIG-5060: TestPigRunner.testDisablePigCounters2 failing with tez (knoguchi)
diff --git a/test/e2e/pig/tests/negative.conf b/test/e2e/pig/tests/negative.conf
index b7b5c87..d64a00e 100644
--- a/test/e2e/pig/tests/negative.conf
+++ b/test/e2e/pig/tests/negative.conf
@@ -473,7 +473,7 @@
 A = load ':INPATH:/singlefile/studenttab10k';
 B = stream A through CMD;
 store B into ':OUTPATH:';\,
-                        'expected_err_regex' => "Error reading output from Streaming binary",
+                        'expected_err_regex' => "Error reading output from Streaming binary|Error while reading from POStream and passing it to the streaming process",
                         },
 			{
 			# Invalid serializer - throws exception