--- src/geo/OCCFace.h.orig	2024-03-29 22:07:01 UTC
+++ src/geo/OCCFace.h
@@ -42,7 +42,7 @@ class OCCFace : public GFace { (public)
   virtual bool containsPoint(const SPoint3 &pt) const;
   virtual bool containsParam(const SPoint2 &pt);
   virtual SVector3 normal(const SPoint2 &param) const;
-  virtual Pair<SVector3, SVector3> firstDer(const SPoint2 &param) const;
+  virtual std::pair<SVector3, SVector3> firstDer(const SPoint2 &param) const;
   virtual void secondDer(const SPoint2 &, SVector3 &, SVector3 &,
                          SVector3 &) const;
   virtual GEntity::GeomType geomType() const;