diff --git a/src/Mod/Part/App/TopoShape.cpp b/src/Mod/Part/App/TopoShape.cpp
index e042295be3..5c617df615 100644
--- a/src/Mod/Part/App/TopoShape.cpp
+++ b/src/Mod/Part/App/TopoShape.cpp
@@ -143,6 +143,7 @@
 # include <StlAPI_Writer.hxx>
 # include <Standard_Failure.hxx>
 # include <gp_GTrsf.hxx>
+# include <gp_Pln.hxx>
 # include <ShapeAnalysis_Shell.hxx>
 # include <ShapeBuild_ReShape.hxx>
 # include <ShapeExtend_Explorer.hxx>
diff --git a/src/Mod/Part/App/TopoShape.h b/src/Mod/Part/App/TopoShape.h
index e0c906138a..7288774fed 100644
--- a/src/Mod/Part/App/TopoShape.h
+++ b/src/Mod/Part/App/TopoShape.h
@@ -33,6 +33,7 @@
 
 class gp_Ax1;
 class gp_Ax2;
+class gp_Pln;
 class gp_Vec;
 
 namespace App {