diff --git a/src/V3AstNodeDType.h b/src/V3AstNodeDType.h
index 32f8f0c0a..da81bf75f 100644
--- a/src/V3AstNodeDType.h
+++ b/src/V3AstNodeDType.h
@@ -820,9 +820,9 @@ public:
     AstNodeDType* skipRefToEnump() const override { return (AstNodeDType*)this; }
     int widthAlignBytes() const override { return subDTypep()->widthAlignBytes(); }
     int widthTotalBytes() const override { return subDTypep()->widthTotalBytes(); }
-    int itemCount() const {
+    size_t itemCount() const {
         size_t count = 0;
-        for (AstNode* itemp = itemsp(); itemp; itemp = itemp->nextp()) count++;
+        for (AstNode* itemp = itemsp(); itemp; itemp = itemp->nextp()) ++count;
         return count;
     }
     bool isCompound() const override { return false; }
diff --git a/src/V3Options.cpp b/src/V3Options.cpp
index 0611b2035..41df829fd 100644
--- a/src/V3Options.cpp
+++ b/src/V3Options.cpp
@@ -493,7 +493,7 @@ string V3Options::fileExists(const string& filename) {
         try {
             for (const auto& dirEntry : std::filesystem::directory_iterator(dir.c_str()))
                 setp->insert(dirEntry.path().filename().string());
-        } catch (std::filesystem::filesystem_error const& ex) { return ""; }
+        } catch (std::filesystem::filesystem_error const& ex) { (void)ex; return ""; }
 #else
         if (DIR* const dirp = opendir(dir.c_str())) {
             while (struct dirent* direntp = readdir(dirp)) setp->insert(direntp->d_name);
diff --git a/src/V3Randomize.cpp b/src/V3Randomize.cpp
index 69cedc7a5..0fa91741c 100644
--- a/src/V3Randomize.cpp
+++ b/src/V3Randomize.cpp
@@ -309,9 +309,9 @@ class RandomizeVisitor final : public VNVisitor {
     AstVar* enumValueTabp(AstEnumDType* nodep) {
         if (nodep->user2p()) return VN_AS(nodep->user2p(), Var);
         UINFO(9, "Construct Venumvaltab " << nodep << endl);
-        AstNodeArrayDType* const vardtypep
-            = new AstUnpackArrayDType{nodep->fileline(), nodep->dtypep(),
-                                      new AstRange{nodep->fileline(), nodep->itemCount(), 0}};
+        AstNodeArrayDType* const vardtypep = new AstUnpackArrayDType{
+            nodep->fileline(), nodep->dtypep(),
+            new AstRange{nodep->fileline(), static_cast<int>(nodep->itemCount()), 0}};
         AstInitArray* const initp = new AstInitArray{nodep->fileline(), vardtypep, nullptr};
         v3Global.rootp()->typeTablep()->addTypesp(vardtypep);
         AstVar* const varp