diff --git a/hadoop-common-project/hadoop-common/CHANGES.txt b/hadoop-common-project/hadoop-common/CHANGES.txt
index a0015347593..e7b14894709 100644
--- a/hadoop-common-project/hadoop-common/CHANGES.txt
+++ b/hadoop-common-project/hadoop-common/CHANGES.txt
@@ -180,6 +180,9 @@ Release 2.5.0 - UNRELEASED
 
     HADOOP-10658. SSLFactory expects truststores being configured. (tucu via atm)
 
+    HADOOP-10647. String Format Exception in SwiftNativeFileSystemStore.java.
+    (Gene Kim via stevel)
+
 Release 2.4.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-tools/hadoop-openstack/src/main/java/org/apache/hadoop/fs/swift/snative/SwiftNativeFileSystemStore.java b/hadoop-tools/hadoop-openstack/src/main/java/org/apache/hadoop/fs/swift/snative/SwiftNativeFileSystemStore.java
index e30b47ba556..e42cb442c93 100644
--- a/hadoop-tools/hadoop-openstack/src/main/java/org/apache/hadoop/fs/swift/snative/SwiftNativeFileSystemStore.java
+++ b/hadoop-tools/hadoop-openstack/src/main/java/org/apache/hadoop/fs/swift/snative/SwiftNativeFileSystemStore.java
@@ -927,7 +927,7 @@ public boolean delete(Path absolutePath, boolean recursive) throws IOException {
     }
 
     if (LOG.isDebugEnabled()) {
-      SwiftUtils.debug(LOG, SwiftUtils.fileStatsToString(statuses, "\n"));
+      SwiftUtils.debug(LOG, "%s", SwiftUtils.fileStatsToString(statuses, "\n"));
     }
 
     if (filecount == 1 && swiftPath.equals(statuses[0].getPath())) {