diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/crypto/CryptoInputStream.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/crypto/CryptoInputStream.java
index a2273bf8334..3d610aaa41a 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/crypto/CryptoInputStream.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/crypto/CryptoInputStream.java
@@ -311,7 +311,7 @@ public class CryptoInputStream extends FilterInputStream implements
   }
   
   @Override
-  public void close() throws IOException {
+  public synchronized void close() throws IOException {
     if (closed) {
       return;
     }