diff --git a/src/CppParser/Parser.cpp b/src/CppParser/Parser.cpp
index deb12ff7..708885c5 100644
--- a/src/CppParser/Parser.cpp
+++ b/src/CppParser/Parser.cpp
@@ -2047,6 +2047,7 @@ PreprocessedEntity* Parser::WalkPreprocessedEntity(
         auto Definition = new MacroDefinition();
         Entity = Definition;
 
+        Definition->Namespace = GetTranslationUnit(MD->getLocation(), NULL);
         Definition->Name = II->getName().trim();
         Definition->Expression = Expression.trim();
     }
diff --git a/src/Parser/Parser.cpp b/src/Parser/Parser.cpp
index a87271ce..1f38b137 100644
--- a/src/Parser/Parser.cpp
+++ b/src/Parser/Parser.cpp
@@ -2071,6 +2071,7 @@ CppSharp::AST::PreprocessedEntity^ Parser::WalkPreprocessedEntity(
         auto Definition = gcnew CppSharp::AST::MacroDefinition();
         Entity = Definition;
 
+        Definition->Namespace = GetTranslationUnit(MD->getLocation(), NULL);
         Definition->Name = clix::marshalString<clix::E_UTF8>(II->getName())->Trim();
         Definition->Expression = clix::marshalString<clix::E_UTF8>(Expression)->Trim();
     }