diff --git a/src/Mod/TechDraw/App/DrawGeomHatch.cpp b/src/Mod/TechDraw/App/DrawGeomHatch.cpp
index 9afc7d4539..65203e4f0d 100644
--- a/src/Mod/TechDraw/App/DrawGeomHatch.cpp
+++ b/src/Mod/TechDraw/App/DrawGeomHatch.cpp
@@ -387,8 +387,6 @@ std::vector<LineSet> DrawGeomHatch::getTrimmedLines(DrawViewPart* source,
 /* static */
 std::vector<TopoDS_Edge> DrawGeomHatch::makeEdgeOverlay(PATLineSpec hatchLine, Bnd_Box bBox, double scale, double rotation)
 {
-    using std::numbers::pi;
-
     const size_t MaxNumberOfEdges = Preferences::getPreferenceGroup("PAT")->GetInt("MaxSeg", 10000l);
 
     std::vector<TopoDS_Edge> result;