diff --git a/include/sta/Corner.hh b/include/sta/Corner.hh
index 4cbf1bff..1e8765e3 100644
--- a/include/sta/Corner.hh
+++ b/include/sta/Corner.hh
@@ -47,6 +47,7 @@ public:
   virtual ~Corners();
   void clear();
   int count() const;
+  void copy(Corners *corners);
   bool multiCorner() const;
   Corner *findCorner(const char *corner);
   Corner *findCorner(int corner_index);
diff --git a/search/Corner.cc b/search/Corner.cc
index 9c68193a..81f6d1f5 100644
--- a/search/Corner.cc
+++ b/search/Corner.cc
@@ -99,6 +99,30 @@ Corners::makeCorners(StringSet *corner_names)
   makeAnalysisPts();
 }
 
+void
+Corners::copy(Corners *corners)
+{
+  clear();
+  int index = 0;
+  for (Corner *orig : corners->corners_) {
+    const char *name = orig->name();
+    Corner *corner = new Corner(name, index);
+    corners_.push_back(corner);
+    // Use the copied name in the map.
+    corner_map_[corner->name()] = corner;
+    index++;
+  }
+  makeAnalysisPts();
+  
+  parasitic_analysis_pts_.deleteContentsClear();
+  for (ParasiticAnalysisPt *orig_ap : corners->parasitic_analysis_pts_) {
+    ParasiticAnalysisPt *ap = new ParasiticAnalysisPt(orig_ap->name(), orig_ap->index(),
+						      orig_ap->minMax());
+    parasitic_analysis_pts_.push_back(ap);
+  }
+  updateCornerParasiticAnalysisPts();
+}
+
 void
 Corners::makeParasiticAnalysisPtsSingle()
 {