diff --git a/hadoop-crypto/src/main/java/com/palantir/hadoop2/cipher/FsCipherOutputStream.java b/hadoop-crypto/src/main/java/com/palantir/hadoop2/cipher/FsCipherOutputStream.java
index 9351e35c3..3d903460e 100644
--- a/hadoop-crypto/src/main/java/com/palantir/hadoop2/cipher/FsCipherOutputStream.java
+++ b/hadoop-crypto/src/main/java/com/palantir/hadoop2/cipher/FsCipherOutputStream.java
@@ -21,6 +21,7 @@
 import com.palantir.crypto2.cipher.CipherStreamSupplierImpl;
 import com.palantir.crypto2.cipher.SeekableCipher;
 import java.io.FilterOutputStream;
+import java.io.IOException;
 import javax.crypto.Cipher;
 import org.apache.hadoop.fs.FSDataOutputStream;
 
@@ -39,4 +40,14 @@ public FsCipherOutputStream(FSDataOutputStream delegate, SeekableCipher cipher)
         super(supplier.getOutputStream(delegate, cipher.initCipher(Cipher.ENCRYPT_MODE)));
     }
 
+    @Override
+    public void write(byte[] bytes, int off, int len) throws IOException {
+        out.write(bytes, off, len);
+    }
+
+    @Override
+    public void write(byte[] bytes) throws IOException {
+        out.write(bytes);
+    }
+
 }
diff --git a/hadoop-crypto/src/test/java/com/palantir/hadoop2/cipher/FsCipherOutputStreamTest.java b/hadoop-crypto/src/test/java/com/palantir/hadoop2/cipher/FsCipherOutputStreamTest.java
index c0a6b1f10..73ab1e8ba 100644
--- a/hadoop-crypto/src/test/java/com/palantir/hadoop2/cipher/FsCipherOutputStreamTest.java
+++ b/hadoop-crypto/src/test/java/com/palantir/hadoop2/cipher/FsCipherOutputStreamTest.java
@@ -24,6 +24,7 @@
 import com.palantir.crypto2.cipher.CipherStreamSupplier;
 import com.palantir.crypto2.cipher.SeekableCipher;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.security.InvalidAlgorithmParameterException;
 import java.security.InvalidKeyException;
 import java.security.NoSuchAlgorithmException;
@@ -37,6 +38,8 @@
 
 public final class FsCipherOutputStreamTest {
 
+    private static final byte[] bytes = "bytes".getBytes(StandardCharsets.UTF_8);
+
     private FSDataOutputStream os;
     private Cipher initCipher;
     private SeekableCipher seekableCipher;
@@ -72,4 +75,16 @@ public void testWrite() throws IOException {
         verify(cos).write(0);
     }
 
+    @Test
+    public void testWrite_callsWriteWithLength() throws IOException {
+        scos.write(bytes, 0, bytes.length);
+        verify(cos).write(bytes, 0, bytes.length);
+    }
+
+    @Test
+    public void testWrite_callsBatchWrite() throws IOException {
+        scos.write(bytes);
+        verify(cos).write(bytes);
+    }
+
 }