diff --git a/sdc/ExceptionPath.cc b/sdc/ExceptionPath.cc
index c4db3ef8..4dd00534 100644
--- a/sdc/ExceptionPath.cc
+++ b/sdc/ExceptionPath.cc
@@ -1421,7 +1421,7 @@ ExceptionTo::matchesFilter(const Pin *pin,
 			   const RiseFall *end_rf,
 			   const Network *network) const
 {
-  // "report -to reg" does match clock pins.
+  // "report -to reg" matches clock pins.
   return matches(pin, clk_edge, end_rf, true, network);
 }
 
@@ -1456,7 +1456,8 @@ ExceptionTo::matches(const Pin *pin,
 	&& (inst_matches_reg_clk_pin
 	    || !network->isRegClkPin(pin))
 	&& insts_->hasKey(network->instance(pin))
-	&& network->direction(pin)->isAnyInput()
+	&& (network->direction(pin)->isAnyInput()
+            || network->direction(pin)->isInternal())
 	&& rf_->matches(end_rf)
 	&& end_rf_->matches(end_rf))
     || (pins_ == nullptr
diff --git a/sdc/Sdc.cc b/sdc/Sdc.cc
index 94361d82..2cb24e96 100644
--- a/sdc/Sdc.cc
+++ b/sdc/Sdc.cc
@@ -3939,7 +3939,8 @@ Sdc::exceptionToInvalid(const Pin *pin)
   Net *net = network_->net(pin);
   // Floating pins are invalid.
   if ((net == nullptr
-       && !network_->isTopLevelPort(pin))
+       && !(network_->isTopLevelPort(pin)
+            || network_->direction(pin)->isInternal()))
       || (net
 	  // Pins connected to power/ground are invalid.
 	  && (network_->isPower(net)
diff --git a/search/Sta.cc b/search/Sta.cc
index 7a47cdd2..15b7c08d 100644
--- a/search/Sta.cc
+++ b/search/Sta.cc
@@ -2027,11 +2027,12 @@ Sta::exceptionFromInvalid(const Pin *pin) const
     || (net
 	// Pins connected to power/ground are invalid.
 	&& (network_->isPower(net)
-	    || network_->isGround(net)))
+            || network_->isGround(net)))
     || !((network_->isTopLevelPort(pin)
 	  && network_->direction(pin)->isAnyInput())
 	 || network_->isRegClkPin(pin)
-	 || network_->isLatchData(pin));
+	 || network_->isLatchData(pin)
+         || network_->direction(pin)->isInternal());
 }
 
 void