diff --git a/profile.sh b/profile.sh
new file mode 100644
index 00000000..3b0187fc
--- /dev/null
+++ b/profile.sh
@@ -0,0 +1,7 @@
+g++ -o pocketpy src/main.cpp --std=c++17 -pg -O1 -fno-rtti
+
+./pocketpy benchmarks/simple.py
+
+gprof pocketpy gmon.out > gprof.txt
+
+rm gmon.out
\ No newline at end of file
diff --git a/src/codeobject.h b/src/codeobject.h
index 6f30c038..3cad23a4 100644
--- a/src/codeobject.h
+++ b/src/codeobject.h
@@ -109,7 +109,7 @@ struct CodeObject {
     /************************************************/
 };
 
-static thread_local i64 kFrameGlobalId = 0;
+static THREAD_LOCAL i64 kFrameGlobalId = 0;
 
 struct Frame {
     std::vector<PyVar> _data;
diff --git a/src/common.h b/src/common.h
index 90e916df..b7eda17b 100644
--- a/src/common.h
+++ b/src/common.h
@@ -56,4 +56,7 @@ template<typename T>
 void* tid() {
 	static volatile int8_t _x;
 	return (void*)(&_x);
-}
\ No newline at end of file
+}
+
+//#define THREAD_LOCAL thread_local
+#define THREAD_LOCAL
\ No newline at end of file
diff --git a/src/obj.h b/src/obj.h
index 6b83d0a7..703b1277 100644
--- a/src/obj.h
+++ b/src/obj.h
@@ -149,7 +149,7 @@ namespace pkpy {
     };
 
     constexpr int kMemObjSize = sizeof(int) + sizeof(Py_<i64>);
-    static thread_local MemBlock<kMemObjSize> _mem_pool(512);
+    static THREAD_LOCAL MemBlock<kMemObjSize> _mem_pool(512);
 
     template<>
     struct SpAllocator<PyObject> {
diff --git a/src/safestl.h b/src/safestl.h
index 66b4a780..23bc1fde 100644
--- a/src/safestl.h
+++ b/src/safestl.h
@@ -39,7 +39,7 @@ typedef emhash8::HashMap<Str, PyVar> NameDict;
 
 namespace pkpy {
     const int kMaxPoolSize = 10;
-    static thread_local std::vector<PyVar*>* _args_pool = new std::vector<PyVar*>[kMaxPoolSize];
+    static THREAD_LOCAL std::vector<PyVar*>* _args_pool = new std::vector<PyVar*>[kMaxPoolSize];
 
     class Args {
         PyVar* _args;