diff --git a/src/parsing.cpp b/src/parsing.cpp
index d23da96..ef01829 100644
--- a/src/parsing.cpp
+++ b/src/parsing.cpp
@@ -15,6 +15,7 @@ namespace parsing {
                 bool is_const = false;
                 if (inner.peek().type == token::Type::Ident && inner.peek().content == "const") {
                     is_const = true;
+                    inner.next();
                 }
 
                 auto token = inner.expect(token::Type::Ident);
diff --git a/src/types.cpp b/src/types.cpp
index d8b0ffd..35612a4 100644
--- a/src/types.cpp
+++ b/src/types.cpp
@@ -42,18 +42,27 @@ namespace types {
     }
 
     std::string FundamentalType::formatted() {
+        std::stringstream out{ "" };
+        if (this->m_const)
+            out << "const ";
         switch (this->m_ty) {
         case FundamentalTypeKind::Int:
-            return "Int";
+            out << "Int";
+            break;
         case FundamentalTypeKind::Bool:
-            return "Bool";
+            out << "Bool";
+            break;
         case FundamentalTypeKind::Char:
-            return "Char";
+            out << "Char";
+            break;
         case FundamentalTypeKind::Void:
-            return "Void";
+            out << "Void";
+            break;
         default:
-            return "Unknown";
+            out << "Unknown";
+            break;
         }
+        return out.str();
     }
 
     std::optional<std::shared_ptr<Type>> Type::return_type() {
@@ -96,6 +105,9 @@ namespace types {
 
     std::string FunctionType::formatted() {
         std::stringstream out{ "" };
+        if (this->m_const)
+            out << "const ";
+
         out << "(";
 
         int counter = 0;
@@ -131,6 +143,9 @@ namespace types {
     std::string PointerType::formatted() {
         std::stringstream out{ "" };
         out << this->m_inner->formatted() << "*";
+        if (this->m_const)
+            out << " const";
+
         return out.str();
     }
 
@@ -147,6 +162,9 @@ namespace types {
 
     std::string ArrayType::formatted() {
         std::stringstream out{ "" };
+        if (this->m_const)
+            out << "const[] ";
+
         out << this->m_inner->formatted();
         out << "[" << this->m_size << "]";
         return out.str();
@@ -163,6 +181,9 @@ namespace types {
 
     std::string StructType::formatted() {
         std::stringstream out{ "" };
+        if (this->m_const)
+            out << "const ";
+
         out << "struct(" << this->m_id << ")";
         if (this->m_is_ref)
             out << "(ref)";
@@ -202,22 +223,6 @@ namespace types {
         return size;
     }
 
-
-    // std::string StructRef::formatted() {
-    //     std::stringstream out{ "" };
-    //     out << "struct(ref) " << this->m_name;
-    //     return out.str();
-    // }
-
-    // std::pair<llvm::Value*, std::shared_ptr<Type>> StructRef::load(codegen::Builder&, llvm::Value* ptr, codegen::TypeMap&) {
-    //     auto self = std::make_shared<StructRef>(*this);
-    //     return std::pair(ptr, self);
-    // }
-
-    // uint32_t StructRef::size() {
-    //     return this->m_referred->size();
-    // }
-
     bool types_equal(std::shared_ptr<types::Type> type1, std::shared_ptr<types::Type> type2) {
         if (type1->m_kind != type2->m_kind)
             return false;
diff --git a/test.c b/test.c
index d6d8ae9..adf8cc9 100644
--- a/test.c
+++ b/test.c
@@ -6,7 +6,7 @@ int fibonacci(int n) {
     return fibonacci(n - 1) + fibonacci(n - 2);
 }
 
-void change_first(char* otus) {
+void change_first(const char* otus) {
     otus[0] = 115;
 }