diff --git a/hadoop-common-project/hadoop-common/CHANGES.txt b/hadoop-common-project/hadoop-common/CHANGES.txt
index 3026e078cb..a784fcf090 100644
--- a/hadoop-common-project/hadoop-common/CHANGES.txt
+++ b/hadoop-common-project/hadoop-common/CHANGES.txt
@@ -83,6 +83,8 @@ Trunk (unreleased changes)
 
     HADOOP-4515. Configuration#getBoolean must not be case sensitive. (Sho Shimauchi via harsh)
 
+    HADOOP-7968. Errant println left in RPC.getHighestSupportedProtocol (Sho Shimauchi via harsh)
+
   BUGS
 
     HADOOP-7851. Configuration.getClasses() never returns the default value. 
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/RPC.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/RPC.java
index cf59746868..321c1d8ef3 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/RPC.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/RPC.java
@@ -791,7 +791,10 @@ VerProtocolImpl getHighestSupportedProtocol(RpcKind rpcKind,
        String protocolName) {    
      Long highestVersion = 0L;
      ProtoClassProtoImpl highest = null;
- System.out.println("Size of protoMap for " + rpcKind + " =" + getProtocolImplMap(rpcKind).size());
+     if (LOG.isDebugEnabled()) {
+       LOG.debug("Size of protoMap for " + rpcKind + " ="
+           + getProtocolImplMap(rpcKind).size());
+     }
      for (Map.Entry<ProtoNameVer, ProtoClassProtoImpl> pv : 
            getProtocolImplMap(rpcKind).entrySet()) {
        if (pv.getKey().protocol.equals(protocolName)) {