diff --git a/CMakeLists.txt b/CMakeLists.txt
index b2740f7..2373699 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -161,10 +161,10 @@ if (Threads_FOUND)
 endif()
 
 option(NO_SELF_PACKER "Disables usage of a self-packer")
-if (NOT (UPPERCASE_BUILD_TYPE STREQUAL "DEBUG" OR UPPERCASE_BUILD_TYPE STREQUAL "RELWITHDEBINFO" OR NO_SELF_PACKER OR DEFINED EMSCRIPTEN OR MINGW))
+if (NOT (UPPERCASE_BUILD_TYPE STREQUAL "DEBUG" OR UPPERCASE_BUILD_TYPE STREQUAL "RELWITHDEBINFO" OR NO_SELF_PACKER OR DEFINED EMSCRIPTEN))
     include(FindSelfPackers)
     if (SELF_PACKER_FOR_EXECUTABLE MATCHES upx) # UPX version d61edc9 or higher is required when using a cross-compiler to target the musl C library
-        if (CMAKE_CXX_LINK_NO_PIE_SUPPORTED)
+        if (CMAKE_CXX_LINK_NO_PIE_SUPPORTED OR MINGW) # MINGW does not support PIE, yet the variable is set to NO.
             set(SELF_PACKER_FOR_EXECUTABLE_FLAGS ${SELF_PACKER_FOR_EXECUTABLE_FLAGS} --ultra-brute --best)
             if (USER_DEFINED_PIE AND CMAKE_POSITION_INDEPENDENT_CODE)
                 message(NOTICE "-- Could NOT manually enable PIE (UPX is in use)")
diff --git a/src/headers/parsing/Parser.hpp b/src/headers/parsing/Parser.hpp
index e953378..5a9f23d 100644
--- a/src/headers/parsing/Parser.hpp
+++ b/src/headers/parsing/Parser.hpp
@@ -149,20 +149,20 @@ namespace Parser {
             } catch (const NamedIdentifier<true>::identifier_reserved_exception&) {
                 parsingError(current, " is a reserved identifier", true);
             }
-            try {
-                const auto& last = parseTree.cend() - 1;
-                const type_info& lastId = last->get()->getId();
-                const auto& last_identifier = dynamic_cast<NamedIdentifier<true>&>(**last);
+            const auto& last = parseTree.cend() - 1;
+            const type_info& lastId = last->get()->getId();
+            const auto& last_identifier = dynamic_cast<NamedIdentifier<true>*>(last->get());
+            if (last_identifier != nullptr) {
                 if (lastId != typeid(Define) and
                     any_of(parseTree.cbegin(), last, [&last_identifier](const component_ptr& pointer){
                         try {
-                            return dynamic_cast<NamedIdentifier<true>&>(*pointer).name == last_identifier.name;
+                            return dynamic_cast<NamedIdentifier<true>&>(*pointer).name == last_identifier->name;
                         } catch (const bad_cast&) {
                             return false;
                         }
                     }))
                 { parsingError(current, " has already been defined previously", true); }
-            } catch (const bad_cast&) {}
+            }
         }
         return parseTree;
     }