diff --git a/libsolutil/CommonData.h b/libsolutil/CommonData.h
index b61ba82a2..5fe0c2bfb 100644
--- a/libsolutil/CommonData.h
+++ b/libsolutil/CommonData.h
@@ -37,7 +37,10 @@
 #include <utility>
 #include <type_traits>
 
-/// Operators need to stay in the global namespace.
+namespace std
+{
+
+/// Operator overloads for STL containers should be in std namespace for ADL to work properly.
 
 /// Concatenate the contents of a container onto a vector
 template <class T, class U> std::vector<T>& operator+=(std::vector<T>& _a, U& _b)
@@ -78,6 +81,7 @@ template <class U, class... T> std::set<T...>& operator+=(std::set<T...>& _a, U&
 		_a.insert(std::move(x));
 	return _a;
 }
+
 /// Concatenate two vectors of elements.
 template <class T>
 inline std::vector<T> operator+(std::vector<T> const& _a, std::vector<T> const& _b)
@@ -86,6 +90,7 @@ inline std::vector<T> operator+(std::vector<T> const& _a, std::vector<T> const&
 	ret += _b;
 	return ret;
 }
+
 /// Concatenate two vectors of elements, moving them.
 template <class T>
 inline std::vector<T> operator+(std::vector<T>&& _a, std::vector<T>&& _b)
@@ -97,6 +102,7 @@ inline std::vector<T> operator+(std::vector<T>&& _a, std::vector<T>&& _b)
 		ret += std::move(_b);
 	return ret;
 }
+
 /// Concatenate something to a sets of elements.
 template <class T, class U>
 inline std::set<T> operator+(std::set<T> const& _a, U&& _b)
@@ -105,6 +111,7 @@ inline std::set<T> operator+(std::set<T> const& _a, U&& _b)
 	ret += std::forward<U>(_b);
 	return ret;
 }
+
 /// Concatenate something to a sets of elements, move variant.
 template <class T, class U>
 inline std::set<T> operator+(std::set<T>&& _a, U&& _b)
@@ -140,6 +147,8 @@ inline std::multiset<T...>& operator-=(std::multiset<T...>& _a, C const& _b)
 	return _a;
 }
 
+} // end namespace std
+
 namespace solidity::util
 {