diff --git a/src/ParagraphMetrics.h b/src/ParagraphMetrics.h
index 0bff836cc3..8aebfd10bf 100644
--- a/src/ParagraphMetrics.h
+++ b/src/ParagraphMetrics.h
@@ -73,7 +73,7 @@ public:
 
 private:
 	///
-	size_type ParagraphMetrics::calculateRowSignature(Row const &);
+	size_type calculateRowSignature(Row const &);
 	///
 	mutable RowList rows_;
 	///