diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..181703a
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+*.x linguist-language=XLang
+*.md linguist-language=Markdown
\ No newline at end of file
diff --git a/src/generation.hxx b/src/generation.hxx
index 5b3e90e..f9f6ecb 100644
--- a/src/generation.hxx
+++ b/src/generation.hxx
@@ -3,7 +3,7 @@
 #include <optional>
 #include <vector>
 #include <cassert>
-#include <unordered_map>
+#include <map>
 
 #include "parser.hxx"
 
@@ -156,5 +156,5 @@ private:
     const node::Prog m_prog;
     std::stringstream m_output;
     size_t m_stack_size = 0;
-    std::unordered_map<std::string, Var> m_vars {};
+    std::map<std::string, Var> m_vars {};
 };
\ No newline at end of file