diff --git a/src/Mod/Sketcher/Gui/CommandCreateGeo.cpp b/src/Mod/Sketcher/Gui/CommandCreateGeo.cpp
index b1dd697b15..53d7be35c8 100644
--- a/src/Mod/Sketcher/Gui/CommandCreateGeo.cpp
+++ b/src/Mod/Sketcher/Gui/CommandCreateGeo.cpp
@@ -228,7 +228,7 @@ void removeRedundantHorizontalVertical(Sketcher::SketchObject* psketch,
 /* Sketch commands =======================================================*/
 
 static const char cursor_crosshair_color_fmt[] = "+ c #%06lX";
-static char cursor_crosshair_color[11];
+static char cursor_crosshair_color[12];
 
 void DrawSketchHandler::setCrosshairColor()
 {