diff --git a/include/CLI/FormatterFwd.hpp b/include/CLI/FormatterFwd.hpp
index 792ebbc8..bdae54d9 100644
--- a/include/CLI/FormatterFwd.hpp
+++ b/include/CLI/FormatterFwd.hpp
@@ -57,6 +57,8 @@ class FormatterBase {
     FormatterBase() = default;
     FormatterBase(const FormatterBase &) = default;
     FormatterBase(FormatterBase &&) = default;
+    FormatterBase &operator=(const FormatterBase &) = default;
+    FormatterBase &operator=(FormatterBase &&) = default;
 
     /// Adding a destructor in this form to work around bug in GCC 4.7
     virtual ~FormatterBase() noexcept {}  // NOLINT(modernize-use-equals-default)
@@ -118,6 +120,8 @@ class Formatter : public FormatterBase {
     Formatter() = default;
     Formatter(const Formatter &) = default;
     Formatter(Formatter &&) = default;
+    Formatter &operator=(const Formatter &) = default;
+    Formatter &operator=(Formatter &&) = default;
 
     /// @name Overridables
     ///@{
diff --git a/include/CLI/Validators.hpp b/include/CLI/Validators.hpp
index 9a6a364e..8b0c5c17 100644
--- a/include/CLI/Validators.hpp
+++ b/include/CLI/Validators.hpp
@@ -750,7 +750,7 @@ class AsNumberWithUnit : public Validator {
 
         // transform function
         func_ = [mapping, opts](std::string &input) -> std::string {
-            Number num;
+            Number num{};
 
             detail::rtrim(input);
             if(input.empty()) {