diff --git a/src/plugins/cvs/cvsutils.cpp b/src/plugins/cvs/cvsutils.cpp
index 274263eecc1..2223222c4fd 100644
--- a/src/plugins/cvs/cvsutils.cpp
+++ b/src/plugins/cvs/cvsutils.cpp
@@ -73,7 +73,7 @@ revision 1.1
 
 QList<CvsLogEntry> parseLogEntries(const QString &o,
                                    const QString &directory,
-                                   const QString filterCommitId)
+                                   const QString &filterCommitId)
 {
     enum ParseState { FileState, RevisionState, StatusLineState };
 
diff --git a/src/plugins/cvs/cvsutils.h b/src/plugins/cvs/cvsutils.h
index 7e0182878da..ddc27cde3ff 100644
--- a/src/plugins/cvs/cvsutils.h
+++ b/src/plugins/cvs/cvsutils.h
@@ -69,7 +69,7 @@ QDebug operator<<(QDebug d, const CvsLogEntry &);
 // running from the repository directory.
 QList<CvsLogEntry> parseLogEntries(const QString &output,
                                    const QString &directory = QString(),
-                                   const QString filterCommitId = QString());
+                                   const QString &filterCommitId = QString());
 
 // Tortoise CVS outputs unknown files with question marks in
 // the diff output on stdout ('? foo'); remove