diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/hooks/GitHook.java b/org.eclipse.jgit/src/org/eclipse/jgit/hooks/GitHook.java
index 49e145088..e19ebcc37 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/hooks/GitHook.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/hooks/GitHook.java
@@ -9,11 +9,10 @@
  */
 package org.eclipse.jgit.hooks;
 
-import static java.nio.charset.StandardCharsets.UTF_8;
-
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
+import java.nio.charset.Charset;
 import java.util.concurrent.Callable;
 
 import org.eclipse.jgit.api.errors.AbortedByHookException;
@@ -155,8 +154,10 @@ protected OutputStream getErrorStream() {
 	 *
 	 * @throws org.eclipse.jgit.api.errors.AbortedByHookException
 	 *             If the underlying hook script exited with non-zero.
+	 * @throws IOException
+	 *             if an IO error occurred
 	 */
-	protected void doRun() throws AbortedByHookException {
+	protected void doRun() throws AbortedByHookException, IOException {
 		final ByteArrayOutputStream errorByteArray = new ByteArrayOutputStream();
 		final TeeOutputStream stderrStream = new TeeOutputStream(errorByteArray,
 				getErrorStream());
@@ -170,7 +171,8 @@ protected void doRun() throws AbortedByHookException {
 				getStdinArgs());
 		if (result.isExecutedWithError()) {
 			throw new AbortedByHookException(
-					new String(errorByteArray.toByteArray(), UTF_8),
+					new String(errorByteArray.toByteArray(),
+							Charset.defaultCharset().name()),
 					getHookName(), result.getExitCode());
 		}
 	}