diff --git a/include/sirit/sirit.h b/include/sirit/sirit.h
index be921c3..2fe9a1b 100644
--- a/include/sirit/sirit.h
+++ b/include/sirit/sirit.h
@@ -62,6 +62,13 @@ class Module {
      */
     Ref Emit(Ref op);
 
+    /**
+     * Adds a global variable
+     * @param variable Global variable to add.
+     * @return Returns variable.
+     */
+    Ref AddGlobalVariable(Ref variable);
+
     // Types
 
     /// Returns type void.
@@ -233,6 +240,8 @@ class Module {
 
     std::vector<std::unique_ptr<Op>> declarations;
 
+    std::vector<Ref> global_variables;
+
     std::vector<Ref> code;
 
     std::vector<std::unique_ptr<Op>> code_store;
diff --git a/src/insts/type.cpp b/src/insts/type.cpp
index c9ada14..3eac6b7 100644
--- a/src/insts/type.cpp
+++ b/src/insts/type.cpp
@@ -6,6 +6,7 @@
 
 #include <cassert>
 #include <optional>
+
 #include "sirit/sirit.h"
 #include "insts.h"
 
diff --git a/src/sirit.cpp b/src/sirit.cpp
index 3d73399..46a7ac7 100644
--- a/src/sirit.cpp
+++ b/src/sirit.cpp
@@ -20,6 +20,13 @@ static void WriteEnum(Stream& stream, spv::Op opcode, T value) {
     op.Write(stream);
 }
 
+template <typename T>
+static void WriteSet(Stream& stream, const T& set) {
+    for (const auto& item : set) {
+        item->Write(stream);
+    }
+}
+
 Module::Module() {}
 
 Module::~Module() = default;
@@ -37,9 +44,7 @@ std::vector<u8> Module::Assemble() const {
     for (auto capability : capabilities) {
         WriteEnum(stream, spv::Op::OpCapability, capability);
     }
-
     // TODO write extensions
-
     // TODO write ext inst imports
 
     Op memory_model_ref{spv::Op::OpMemoryModel};
@@ -47,24 +52,13 @@ std::vector<u8> Module::Assemble() const {
     memory_model_ref.Add(static_cast<u32>(memory_model));
     memory_model_ref.Write(stream);
 
-    for (const auto& entry_point : entry_points) {
-        entry_point->Write(stream);
-    }
-
+    WriteSet(stream, entry_points);
     // TODO write execution mode
-
-    for (const auto& debug_symbol : debug) {
-        debug_symbol->Write(stream);
-    }
-
+    WriteSet(stream, debug);
     // TODO write annotations
-
-    for (const auto& decl : declarations) {
-        decl->Write(stream);
-    }
-    for (const auto& line : code) {
-        line->Write(stream);
-    }
+    WriteSet(stream, declarations);
+    WriteSet(stream, global_variables);
+    WriteSet(stream, code);
 
     return bytes;
 }
@@ -98,6 +92,12 @@ Ref Module::Emit(Ref op) {
     return op;
 }
 
+Ref Module::AddGlobalVariable(Ref variable) {
+    assert(variable);
+    global_variables.push_back(variable);
+    return variable;
+}
+
 Ref Module::AddCode(Op* op) {
     code_store.push_back(std::unique_ptr<Op>(op));
     return op;