diff --git a/src/gui/src/staGuiInterface.cpp b/src/gui/src/staGuiInterface.cpp
index 317ed073f9f..5b34b49541c 100644
--- a/src/gui/src/staGuiInterface.cpp
+++ b/src/gui/src/staGuiInterface.cpp
@@ -700,7 +700,7 @@ void ClockTree::addPath(sta::PathExpanded& path,
 
 void ClockTree::addPath(sta::PathExpanded& path, const sta::StaState* sta)
 {
-  sta::PathRef* start = path.startPath();
+  const sta::PathRef* start = path.startPath();
   if (start->clkEdge(sta)->transition() != sta::RiseFall::rise()) {
     // only populate with rising edges
     return;
diff --git a/src/sta b/src/sta
index 218aa0dd30d..2c5df8ccbc0 160000
--- a/src/sta
+++ b/src/sta
@@ -1 +1 @@
-Subproject commit 218aa0dd30d0bd0fa50a401b5e9e6231383aeebf
+Subproject commit 2c5df8ccbc09a98bd39af206339505754cbee339