diff --git a/nexus/constids.inc b/nexus/constids.inc
index 596d064cb5..19f34523c8 100644
--- a/nexus/constids.inc
+++ b/nexus/constids.inc
@@ -510,6 +510,9 @@ X(U2END2)
 X(U3END3)
 X(UED0THEN)
 X(URXCKINE)
+X(UCENCK)
+X(U3TDE5CK)
+X(UTXCKE)
 
 X(GENERAL)
 
diff --git a/nexus/global.cc b/nexus/global.cc
index 0792715dbd..ec6f66a280 100644
--- a/nexus/global.cc
+++ b/nexus/global.cc
@@ -166,8 +166,8 @@ struct NexusGlobalRouter
 
     bool is_relaxed_sink(const PortRef &sink) const
     {
-        // This DPHY clock port can't be routed without going through some general routing
-        if (sink.cell->type == id_DPHY_CORE && sink.port == id_URXCKINE)
+        // These DPHY clock ports can't be routed without going through some general routing
+        if (sink.cell->type == id_DPHY_CORE && sink.port.in(id_URXCKINE, id_UCENCK, id_UTXCKE, id_U3TDE5CK))
             return true;
         // Cases where global clocks are driving fabric
         if ((sink.cell->type == id_OXIDE_COMB && sink.port != id_WCK) ||
diff --git a/nexus/pack.cc b/nexus/pack.cc
index 4ebe68d1f1..d41766dc51 100644
--- a/nexus/pack.cc
+++ b/nexus/pack.cc
@@ -82,19 +82,22 @@ Property Arch::parse_lattice_param(const Property &val, IdString prop, int width
             }
             temp = Property(ival);
         }
-
-        for (auto b : temp.str.substr(width)) {
-            if (b == Property::S1)
-                log_error("Found value for property %s.%s with width greater than %d\n", ci, nameOf(prop), width);
+        if (int(temp.size()) > width) {
+            for (auto b : temp.str.substr(width)) {
+                if (b == Property::S1)
+                    log_error("Found value for property %s.%s with width greater than %d\n", ci, nameOf(prop), width);
+            }
         }
         temp.update_intval();
         return temp.extract(0, width);
     } else {
-        for (auto b : val.str.substr(width)) {
-            if (b == Property::S1)
-                log_error("Found bitvector value for property %s.%s with width greater than %d - perhaps a string was "
-                          "converted to bits?\n",
-                          ci, nameOf(prop), width);
+        if (int(val.str.size()) > width) {
+            for (auto b : val.str.substr(width)) {
+                if (b == Property::S1)
+                    log_error("Found bitvector value for property %s.%s with width greater than %d - perhaps a string was "
+                              "converted to bits?\n",
+                              ci, nameOf(prop), width);
+            }
         }
         return val.extract(0, width);
     }