diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/transport/BaseReceivePack.java b/org.eclipse.jgit/src/org/eclipse/jgit/transport/BaseReceivePack.java
index b5f9e2f02..c4f662be9 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/transport/BaseReceivePack.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/transport/BaseReceivePack.java
@@ -67,6 +67,7 @@ import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
 
+import org.eclipse.jgit.errors.InvalidObjectIdException;
 import org.eclipse.jgit.errors.MissingObjectException;
 import org.eclipse.jgit.errors.PackProtocolException;
 import org.eclipse.jgit.errors.TooLargePackException;
@@ -1147,7 +1148,7 @@ public abstract class BaseReceivePack {
 		try {
 			oldId = ObjectId.fromString(oldStr);
 			newId = ObjectId.fromString(newStr);
-		} catch (IllegalArgumentException e) {
+		} catch (InvalidObjectIdException e) {
 			throw new PackProtocolException(
 					JGitText.get().errorInvalidProtocolWantedOldNewRef, e);
 		}