diff --git a/data/dynos_cmap.cpp b/data/dynos_cmap.cpp
new file mode 100644
index 00000000..02680cbc
--- /dev/null
+++ b/data/dynos_cmap.cpp
@@ -0,0 +1,74 @@
+#include <map>
+
+typedef std::map<int64_t, void*> Map;
+
+struct MapIter {
+    Map* map;
+    Map::iterator itr;
+};
+
+extern "C" {
+
+void* hmap_create() {
+    return reinterpret_cast<void*> (new Map());
+}
+
+void* hmap_get(void* map, int64_t k) {
+    Map* m = reinterpret_cast<Map*> (map);
+    Map::iterator pos = m->find(k);
+    if (pos == m->end()) {
+        return NULL;
+    } else {
+        return pos->second;
+    }
+}
+
+void hmap_put(void* map, int64_t k, void* v) {
+    Map* m = reinterpret_cast<Map*> (map);
+    if (m->count(k) > 0) {
+        m->erase(k);
+    }
+    m->insert(std::pair<int64_t, void*>(k, v));
+}
+
+void hmap_del(void* map, int64_t k) {
+    Map* m = reinterpret_cast<Map*> (map);
+    m->erase(k);
+}
+
+void hmap_clear(void* map) {
+    Map* m = reinterpret_cast<Map*> (map);
+    m->clear();
+}
+
+size_t hmap_len(void* map) {
+    Map* m = reinterpret_cast<Map*> (map);
+    return m->size();
+}
+
+void* hmap_iter(void* map) {
+    auto iter = new MapIter();
+    Map* m = reinterpret_cast<Map*> (map);
+    iter->map = m;
+    return reinterpret_cast<void*> (iter);
+}
+
+void* hmap_begin(void* iter) {
+    MapIter* i = reinterpret_cast<MapIter*> (iter);
+    i->itr = i->map->begin();
+    if (i->itr == i->map->end()) {
+        return NULL;
+    }
+    return i->itr->second;
+}
+
+void* hmap_next(void* iter) {
+    MapIter* i = reinterpret_cast<MapIter*> (iter);
+    i->itr++;
+    if (i->itr == i->map->end()) {
+        return NULL;
+    }
+    return i->itr->second;
+}
+
+} // extern "C"
\ No newline at end of file
diff --git a/data/dynos_cmap.cpp.h b/data/dynos_cmap.cpp.h
new file mode 100644
index 00000000..77c7c7f7
--- /dev/null
+++ b/data/dynos_cmap.cpp.h
@@ -0,0 +1,17 @@
+#ifndef DYNOS_CMAP_CPP_H
+#define DYNOS_CMAP_CPP_H
+#ifndef __cplusplus
+
+void* hmap_create();
+void* hmap_get(void* map, int64_t k);
+void hmap_put(void* map, int64_t k, void* v);
+void hmap_del(void* map, int64_t k);
+void hmap_clear(void* map);
+size_t hmap_len(void* map);
+
+void* hmap_iter(void* map);
+void* hmap_begin(void* iter);
+void* hmap_next(void* iter);
+
+#endif
+#endif
\ No newline at end of file
diff --git a/src/pc/lua/smlua_cobject_allowlist.c b/src/pc/lua/smlua_cobject_allowlist.c
index ecd6a166..e1631b9d 100644
--- a/src/pc/lua/smlua_cobject_allowlist.c
+++ b/src/pc/lua/smlua_cobject_allowlist.c
@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include "smlua.h"
+#define STB_DS_IMPLEMENTATION 1
 #include "pc/utils/stb_ds.h"
 
 struct AllowList {
diff --git a/src/pc/network/sync_object.c b/src/pc/network/sync_object.c
index 343c539f..7aee05f9 100644
--- a/src/pc/network/sync_object.c
+++ b/src/pc/network/sync_object.c
@@ -10,15 +10,10 @@
 #include "game/object_helpers.h"
 #include "pc/debuglog.h"
 #include "pc/utils/misc.h"
+#include "data/dynos_cmap.cpp.h"
 
-#define STB_DS_IMPLEMENTATION 1
-#include "pc/utils/stb_ds.h"
-
-struct SyncObjectEntry {
-    u64 key;
-    struct SyncObject* value;
-};
-struct SyncObjectEntry* sSoMap = NULL;
+void* sSoMap = NULL;
+void* sSoIter = NULL;
 
 struct SyncObjectForgetEntry {
     struct SyncObject* so;
@@ -28,13 +23,17 @@ struct SyncObjectForgetEntry {
 struct SyncObjectForgetEntry* sForgetList = NULL;
 
 static u32 sNextSyncId = SYNC_ID_BLOCK_SIZE / 2;
-static u32 sIterateIndex = 0;
 static bool sFreeingAll = false;
 
   ////////////
  // system //
 ////////////
 
+void sync_objects_init_system(void) {
+    sSoMap = hmap_create();
+    sSoIter = hmap_iter(sSoMap);
+}
+
 static bool sync_objects_forget_list_contains(struct SyncObject* so) {
     struct SyncObjectForgetEntry* entry = sForgetList;
     while (entry) {
@@ -80,8 +79,7 @@ void sync_objects_clear(void) {
         sync_object_forget(so->id);
     }
     sFreeingAll = false;
-    hmfree(sSoMap);
-    hmdefault(sSoMap, NULL);
+    hmap_clear(sSoMap);
 }
 
 void sync_object_forget(u32 syncId) {
@@ -111,7 +109,7 @@ void sync_object_forget(u32 syncId) {
     so->owned = false;
 
     if (!sFreeingAll) {
-        hmdel(sSoMap, syncId);
+        hmap_del(sSoMap, syncId);
     }
 
     // add it to a list to free later
@@ -239,23 +237,15 @@ void sync_object_init_field_with_size(struct Object *o, void* field, u8 size) {
 
 struct SyncObject* sync_object_get(u32 syncId) {
     if (syncId == 0) { return NULL; }
-    return hmget(sSoMap, syncId);
+    return hmap_get(sSoMap, syncId);
 }
 
 struct SyncObject* sync_object_get_first(void) {
-    sIterateIndex = 0;
-    if (sSoMap && sIterateIndex < hmlen(sSoMap)) {
-        return sSoMap[sIterateIndex].value;
-    }
-    return NULL;
+    return hmap_begin(sSoIter);
 }
 
 struct SyncObject* sync_object_get_next(void) {
-    sIterateIndex++;
-    if (sSoMap && sIterateIndex < hmlen(sSoMap)) {
-        return sSoMap[sIterateIndex].value;
-    }
-    return NULL;
+    return hmap_next(sSoIter);
 }
 
 struct Object* sync_object_get_object(u32 syncId) {
@@ -415,8 +405,8 @@ bool sync_object_set_id(struct Object* o) {
         so = calloc(1, sizeof(struct SyncObject));
         so->id = syncId;
         so->extendedModelId = 0xFFFF;
-        hmput(sSoMap, syncId, so);
-        LOG_INFO("Allocated sync object @ %u, size %ld", syncId, hmlen(sSoMap));
+        hmap_put(sSoMap, syncId, so);
+        LOG_INFO("Allocated sync object @ %u, size %ld", syncId, hmap_len(sSoMap));
     }
 
     if (!so) {
diff --git a/src/pc/network/sync_object.h b/src/pc/network/sync_object.h
index 48e9651b..98f82826 100644
--- a/src/pc/network/sync_object.h
+++ b/src/pc/network/sync_object.h
@@ -41,6 +41,7 @@ struct SyncObject {
   ////////////
  // system //
 ////////////
+void sync_objects_init_system(void);
 void sync_objects_update(void);
 void sync_objects_clear(void);
 void sync_object_forget(u32 syncId);
diff --git a/src/pc/pc_main.c b/src/pc/pc_main.c
index a087e0f6..bd0f5ef4 100644
--- a/src/pc/pc_main.c
+++ b/src/pc/pc_main.c
@@ -272,6 +272,7 @@ void main_func(void) {
     const char *userpath = gCLIOpts.SavePath[0] ? gCLIOpts.SavePath : sys_user_path();
     fs_init(sys_ropaths, gamedir, userpath);
 
+    sync_objects_init_system();
     mods_init();
     configfile_load(configfile_name());
     dynos_pack_init();