diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/blame/BlameGenerator.java b/org.eclipse.jgit/src/org/eclipse/jgit/blame/BlameGenerator.java
index 8961537ce..e69cfa9d1 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/blame/BlameGenerator.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/blame/BlameGenerator.java
@@ -45,6 +45,7 @@ package org.eclipse.jgit.blame;
 
 import static org.eclipse.jgit.lib.Constants.OBJ_BLOB;
 import static org.eclipse.jgit.lib.FileMode.TYPE_FILE;
+import static org.eclipse.jgit.lib.FileMode.TYPE_MASK;
 
 import java.io.IOException;
 import java.util.Collection;
@@ -955,7 +956,7 @@ public class BlameGenerator {
 	}
 
 	private static final boolean isFile(int rawMode) {
-		return (rawMode & TYPE_FILE) == TYPE_FILE;
+		return (rawMode & TYPE_MASK) == TYPE_FILE;
 	}
 
 	private DiffEntry findRename(RevCommit parent, RevCommit commit,