diff --git a/dcalc/GraphDelayCalc1.cc b/dcalc/GraphDelayCalc1.cc
index 872b1a10..95f13931 100644
--- a/dcalc/GraphDelayCalc1.cc
+++ b/dcalc/GraphDelayCalc1.cc
@@ -828,6 +828,12 @@ GraphDelayCalc1::findInputArcDelay(LibertyCell *drvr_cell,
   }
 }
 
+void
+GraphDelayCalc1::findDelays(Vertex *drvr_vertex)
+{
+  findVertexDelay(drvr_vertex, arc_delay_calc_, true);
+}
+
 void
 GraphDelayCalc1::findVertexDelay(Vertex *vertex,
 				 ArcDelayCalc *arc_delay_calc,
diff --git a/dcalc/GraphDelayCalc1.hh b/dcalc/GraphDelayCalc1.hh
index ab25442a..b4b8bf79 100644
--- a/dcalc/GraphDelayCalc1.hh
+++ b/dcalc/GraphDelayCalc1.hh
@@ -43,6 +43,7 @@ public:
   virtual void deleteVertexBefore(Vertex *vertex);
   virtual void clear();
   virtual void findDelays(Level level);
+  virtual void findDelays(Vertex *drvr_vertex);
   virtual string *reportDelayCalc(Edge *edge,
 				  TimingArc *arc,
 				  const Corner *corner,
diff --git a/include/sta/GraphDelayCalc.hh b/include/sta/GraphDelayCalc.hh
index d36ad3a5..235fc8de 100644
--- a/include/sta/GraphDelayCalc.hh
+++ b/include/sta/GraphDelayCalc.hh
@@ -47,6 +47,8 @@ public:
   virtual void copyState(const StaState *sta);
   // Find arc delays and vertex slews thru level.
   virtual void findDelays(Level /* level */) {};
+  // Find and annotate drvr_vertex gate and load delays/slews.
+  virtual void findDelays(Vertex * /* drvr_vertex */) {};
   // Invalidate all delays/slews.
   virtual void delaysInvalid() {};
   // Invalidate vertex and downstream delays/slews.