diff --git a/src/plugins/git/instantblame.cpp b/src/plugins/git/instantblame.cpp
index 498bc42c1a9..493ab230d35 100644
--- a/src/plugins/git/instantblame.cpp
+++ b/src/plugins/git/instantblame.cpp
@@ -308,15 +308,13 @@ void InstantBlame::setup()
 static CommitInfo parseBlameOutput(const QStringList &blame, const Utils::FilePath &filePath,
                                    int line, const Git::Internal::Author &author)
 {
-    static const QString uncommittedHash(40, '0');
-
     CommitInfo result;
     if (blame.size() <= 12)
         return result;
 
     const QStringList firstLineParts = blame.at(0).split(" ");
     result.hash = firstLineParts.first();
-    result.modified = result.hash == uncommittedHash;
+    result.modified = !gitClient().isValidRevision(result.hash);
     if (result.modified) {
         result.author = Tr::tr("Not Committed Yet");
         result.subject = Tr::tr("Modified line in %1").arg(filePath.fileName());