diff --git a/src/V3Dfg.h b/src/V3Dfg.h
index 247a177b3..5d86805f8 100644
--- a/src/V3Dfg.h
+++ b/src/V3Dfg.h
@@ -101,13 +101,15 @@ class DfgGraph final {
         DfgGraph* m_graphp;  // The referenced graph
 
     public:
-        explicit UserDataInUse(DfgGraph* graphp)
+        // cppcheck-suppress noExplicitConstructor
+        UserDataInUse(DfgGraph* graphp)
             : m_graphp{graphp} {}
-        VL_UNCOPYABLE(UserDataInUse);
-        explicit UserDataInUse(UserDataInUse&& that) {
+        // cppcheck-suppress noExplicitConstructor
+        UserDataInUse(UserDataInUse&& that) {
             UASSERT(that.m_graphp, "Moving from empty");
             m_graphp = vlstd::exchange(that.m_graphp, nullptr);
         }
+        VL_UNCOPYABLE(UserDataInUse);
         UserDataInUse& operator=(UserDataInUse&& that) {
             UASSERT(that.m_graphp, "Moving from empty");
             m_graphp = vlstd::exchange(that.m_graphp, nullptr);
diff --git a/src/V3File.h b/src/V3File.h
index db1104ae2..ba2b5c6d1 100644
--- a/src/V3File.h
+++ b/src/V3File.h
@@ -285,7 +285,7 @@ public:
     explicit V3OutVFile(const string& filename)
         : V3OutCFile{filename, V3OutFormatter::LA_VERILOG} {}
     ~V3OutVFile() override = default;
-    virtual void putsHeader() { puts("// Verilated -*- Verilog -*-\n"); }
+    void putsHeader() override { puts("// Verilated -*- Verilog -*-\n"); }
 };
 
 class V3OutXmlFile final : public V3OutFile {