diff --git a/include/sta/Sta.hh b/include/sta/Sta.hh
index e0f30787..4026a59e 100644
--- a/include/sta/Sta.hh
+++ b/include/sta/Sta.hh
@@ -538,6 +538,8 @@ public:
                Sdc *sdc);
   void removeDisable(TimingArcSet *arc_set,
                      Sdc *sdc);
+  [[nodiscard]] bool isConstant(const Pin *pin,
+                                const Mode *mode) const;
   // Edge is disabled by constant.
   [[nodiscard]] bool isDisabledConstant(Edge *edge,
                                         const Mode *mode);
diff --git a/search/Sta.cc b/search/Sta.cc
index b79a74c9..92a57470 100644
--- a/search/Sta.cc
+++ b/search/Sta.cc
@@ -1715,6 +1715,15 @@ Sta::isDisabledConstraint(Edge *edge,
     || sdc->isDisabledConstraint(edge);
 }
 
+bool
+Sta::isConstant(const Pin *pin,
+                const Mode *mode) const
+{
+  Sim *sim = mode->sim();
+  sim->ensureConstantsPropagated();
+  return sim->isConstant(pin);
+}
+
 bool
 Sta::isDisabledConstant(Edge *edge,
                         const Mode *mode)