diff --git a/src/pc/lua/smlua_cobject.c b/src/pc/lua/smlua_cobject.c
index 32bbaedf..eb7ea038 100644
--- a/src/pc/lua/smlua_cobject.c
+++ b/src/pc/lua/smlua_cobject.c
@@ -390,7 +390,7 @@ static int smlua__get_field(lua_State* L) {
 
     // Legacy support
     if (strcmp(key, "_pointer") == 0) {
-        lua_pushinteger(L, (u64)(intptr_t) cobj->pointer);
+        lua_pushinteger(L, pointer);
         return 1;
     }
     if (strcmp(key, "_lot") == 0) {
@@ -554,7 +554,7 @@ int smlua__gc(lua_State *L) {
     if (!cobj->freed) {
         switch (cobj->lot) {
             case LOT_SURFACE: {
-                smlua_pointer_user_data_delete((u64)(intptr_t) cobj->pointer);
+                smlua_pointer_user_data_delete((uintptr_t) cobj->pointer);
             }
         }
     }
diff --git a/src/pc/lua/smlua_cobject_map.c b/src/pc/lua/smlua_cobject_map.c
index 2708dd51..d0bf5128 100644
--- a/src/pc/lua/smlua_cobject_map.c
+++ b/src/pc/lua/smlua_cobject_map.c
@@ -12,7 +12,7 @@ void smlua_pointer_user_data_init(void) {
     smlua_pointer_user_data_shutdown();
 }
 
-void smlua_pointer_user_data_add(u64 pointer, CObject *obj) {
+void smlua_pointer_user_data_add(uintptr_t pointer, CObject *obj) {
     if (pointer == 0) { return; }
 
     if (!sPointers) {
@@ -24,12 +24,12 @@ void smlua_pointer_user_data_add(u64 pointer, CObject *obj) {
     }
 }
 
-void smlua_pointer_user_data_delete(u64 pointer) {
+void smlua_pointer_user_data_delete(uintptr_t pointer) {
     if (pointer == 0) { return; }
     hmap_del(sPointers, pointer);
 }
 
-CObject *smlua_pointer_user_data_get(u64 pointer) {
+CObject *smlua_pointer_user_data_get(uintptr_t pointer) {
     if (pointer == 0) { return NULL; }
     return hmap_get(sPointers, pointer);
 }
diff --git a/src/pc/lua/smlua_cobject_map.h b/src/pc/lua/smlua_cobject_map.h
index 1bbf9c96..e5e22a37 100644
--- a/src/pc/lua/smlua_cobject_map.h
+++ b/src/pc/lua/smlua_cobject_map.h
@@ -3,8 +3,8 @@
 
 void smlua_pointer_user_data_init(void);
 void smlua_pointer_user_data_shutdown(void);
-void smlua_pointer_user_data_add(u64 pointer, CObject *obj);
-void smlua_pointer_user_data_delete(u64 pointer);
-CObject *smlua_pointer_user_data_get(u64 pointer);
+void smlua_pointer_user_data_add(uintptr_t pointer, CObject *obj);
+void smlua_pointer_user_data_delete(uintptr_t pointer);
+CObject *smlua_pointer_user_data_get(uintptr_t pointer);
 
 #endif
diff --git a/src/pc/lua/smlua_utils.c b/src/pc/lua/smlua_utils.c
index 499d8926..9ae8d8ec 100644
--- a/src/pc/lua/smlua_utils.c
+++ b/src/pc/lua/smlua_utils.c
@@ -364,7 +364,7 @@ void smlua_push_object(lua_State* L, u16 lot, void* p) {
 
     switch (lot) {
         case LOT_SURFACE: {
-            smlua_pointer_user_data_add((u64)(intptr_t) p, cobject);
+            smlua_pointer_user_data_add((uintptr_t) p, cobject);
         }
     }
 }
@@ -735,10 +735,10 @@ void smlua_logline(void) {
 // Lua is able to use-after-free that pointer
 void smlua_free(void *ptr) {
     if (ptr && gLuaState) {
-        CObject *obj = smlua_pointer_user_data_get((u64)(intptr_t) ptr);
+        CObject *obj = smlua_pointer_user_data_get((uintptr_t) ptr);
         if (obj) {
             obj->freed = true;
-            smlua_pointer_user_data_delete((u64)(intptr_t) ptr);
+            smlua_pointer_user_data_delete((uintptr_t) ptr);
         }
     }
     free(ptr);