diff --git a/src/plugins/bookmarks/bookmarksplugin.cpp b/src/plugins/bookmarks/bookmarksplugin.cpp
index 3f5ef3f6c0182963e28f1aed74983052991801a7..c604ca708892b4e06af9df245eba82e45594e069 100644
--- a/src/plugins/bookmarks/bookmarksplugin.cpp
+++ b/src/plugins/bookmarks/bookmarksplugin.cpp
@@ -55,7 +55,8 @@ using namespace TextEditor;
 BookmarksPlugin *BookmarksPlugin::m_instance = 0;
 
 BookmarksPlugin::BookmarksPlugin()
-    : m_bookmarkManager(0)
+    : m_bookmarkManager(0),
+      m_bookmarkMarginActionLineNumber(0)
 {
     m_instance = this;
 }