diff --git a/src/Mod/TechDraw/App/LineGenerator.h b/src/Mod/TechDraw/App/LineGenerator.h
index 41013a8065..c0037c5689 100644
--- a/src/Mod/TechDraw/App/LineGenerator.h
+++ b/src/Mod/TechDraw/App/LineGenerator.h
@@ -39,7 +39,7 @@
 #define DASHEDLINEGENERATOR_H
 
 #include <Mod/TechDraw/TechDrawGlobal.h>
-
+#include <map>
 #include <QPen>
 
 namespace TechDraw {