diff --git a/include/WinStd/COM.h b/include/WinStd/COM.h
index bf617ab2..26a1f15b 100644
--- a/include/WinStd/COM.h
+++ b/include/WinStd/COM.h
@@ -29,19 +29,7 @@ namespace winstd
     class WINSTD_API bstr;
     class WINSTD_API variant;
     class WINSTD_API com_initializer;
-
-    ///
-    /// \defgroup WinStdExceptions Exceptions
-    /// Additional exceptions
-    ///
-    /// @{
-
-    ///
-    /// COM runtime error
-    ///
-    typedef num_runtime_error<HRESULT> com_runtime_error;
-
-    /// @}
+    class WINSTD_API com_runtime_error;
 }
 
 #pragma once
@@ -975,4 +963,53 @@ namespace winstd
     protected:
         HRESULT m_result;   ///< Result of CoInitialize call
     };
+
+
+    ///
+    /// \defgroup WinStdExceptions Exceptions
+    /// Additional exceptions
+    ///
+    /// @{
+
+    ///
+    /// COM runtime error
+    ///
+    /// \note Must be defined as derived class from num_runtime_error<> to allow correct type info for dynamic typecasting and prevent folding with other derivates of num_runtime_error<>.
+    ///
+    class WINSTD_API com_runtime_error : public num_runtime_error<HRESULT>
+    {
+    public:
+        ///
+        /// Constructs an exception
+        ///
+        /// \param[in] error  COM error code
+        /// \param[in] msg    Error message
+        ///
+        inline com_runtime_error(_In_ error_type num, _In_ const std::string& msg) : num_runtime_error<HRESULT>(num, msg.c_str())
+        {
+        }
+
+
+        ///
+        /// Constructs an exception
+        ///
+        /// \param[in] num  COM error code
+        /// \param[in] msg  Error message
+        ///
+        inline com_runtime_error(_In_ error_type num, _In_z_ const char *msg) : num_runtime_error<HRESULT>(num, msg)
+        {
+        }
+
+
+        ///
+        /// Copies an exception
+        ///
+        /// \param[in] other  Exception to copy from
+        ///
+        inline com_runtime_error(const com_runtime_error &other) : num_runtime_error<HRESULT>(other)
+        {
+        }
+    };
+
+    /// @}
 }
diff --git a/include/WinStd/Common.h b/include/WinStd/Common.h
index 61e9e454..5d5cefdb 100644
--- a/include/WinStd/Common.h
+++ b/include/WinStd/Common.h
@@ -702,7 +702,7 @@ namespace winstd
     /// @{
 
     ///
-    /// Windows runtime error
+    /// Numerical runtime error
     ///
     template <typename _Tn>
     class num_runtime_error : public std::runtime_error
@@ -798,7 +798,7 @@ namespace winstd
         ///
         /// Constructs an exception
         ///
-        /// \param[in] num  Numeric error code
+        /// \param[in] num  Windows error code
         /// \param[in] msg  Error message
         ///
         inline win_runtime_error(_In_ error_type num, _In_z_ const char *msg) : num_runtime_error<DWORD>(num, msg)
diff --git a/include/WinStd/Sec.h b/include/WinStd/Sec.h
index 55e862f2..6f1b9c70 100644
--- a/include/WinStd/Sec.h
+++ b/include/WinStd/Sec.h
@@ -31,19 +31,7 @@ namespace winstd
     class WINSTD_API sec_credentials;
     class WINSTD_API sec_context;
     class WINSTD_API sec_buffer_desc;
-
-    ///
-    /// \defgroup WinStdExceptions Exceptions
-    /// Additional exceptions
-    ///
-    /// @{
-
-    ///
-    /// COM runtime error
-    ///
-    typedef num_runtime_error<SECURITY_STATUS> sec_runtime_error;
-
-    /// @}
+    class WINSTD_API sec_runtime_error;
 }
 
 #pragma once
@@ -358,4 +346,53 @@ namespace winstd
     };
 
     /// @}
+
+
+    ///
+    /// \defgroup WinStdExceptions Exceptions
+    /// Additional exceptions
+    ///
+    /// @{
+
+    ///
+    /// COM runtime error
+    ///
+    /// \note Must be defined as derived class from num_runtime_error<> to allow correct type info for dynamic typecasting and prevent folding with other derivates of num_runtime_error<>.
+    ///
+    class WINSTD_API sec_runtime_error : public num_runtime_error<SECURITY_STATUS>
+    {
+    public:
+        ///
+        /// Constructs an exception
+        ///
+        /// \param[in] error  Security provider error code
+        /// \param[in] msg    Error message
+        ///
+        inline sec_runtime_error(_In_ error_type num, _In_ const std::string& msg) : num_runtime_error<SECURITY_STATUS>(num, msg.c_str())
+        {
+        }
+
+
+        ///
+        /// Constructs an exception
+        ///
+        /// \param[in] num  Security provider error code
+        /// \param[in] msg  Error message
+        ///
+        inline sec_runtime_error(_In_ error_type num, _In_z_ const char *msg) : num_runtime_error<SECURITY_STATUS>(num, msg)
+        {
+        }
+
+
+        ///
+        /// Copies an exception
+        ///
+        /// \param[in] other  Exception to copy from
+        ///
+        inline sec_runtime_error(const sec_runtime_error &other) : num_runtime_error<SECURITY_STATUS>(other)
+        {
+        }
+    };
+
+    /// @}
 }