diff --git a/src/api/api.c b/src/api/api.c
index 05bc2260..93d631d0 100644
--- a/src/api/api.c
+++ b/src/api/api.c
@@ -392,6 +392,24 @@ int luax_setconf(lua_State* L) {
   return 0;
 }
 
+void luax_pushstash(lua_State* L, const char* name) {
+  lua_getfield(L, LUA_REGISTRYINDEX, name);
+
+  if (lua_isnil(L, -1)) {
+    lua_newtable(L);
+    lua_replace(L, -2);
+
+    // metatable
+    lua_newtable(L);
+    lua_pushliteral(L, "k");
+    lua_setfield(L, -2, "__mode");
+    lua_setmetatable(L, -2);
+
+    lua_pushvalue(L, -1);
+    lua_setfield(L, LUA_REGISTRYINDEX, name);
+  }
+}
+
 void luax_setmainthread(lua_State *L) {
 #if LUA_VERSION_NUM < 502
   lua_pushthread(L);
diff --git a/src/api/api.h b/src/api/api.h
index 61be5669..e5037f76 100644
--- a/src/api/api.h
+++ b/src/api/api.h
@@ -123,6 +123,7 @@ void luax_traceback(lua_State* L, lua_State* T, const char* message, int level);
 int luax_getstack(lua_State* L);
 void luax_pushconf(lua_State* L);
 int luax_setconf(lua_State* L);
+void luax_pushstash(lua_State* L, const char* name);
 void luax_setmainthread(lua_State* L);
 void luax_atexit(lua_State* L, void (*finalizer)(void));
 uint32_t _luax_checku32(lua_State* L, int index);
diff --git a/src/api/l_physics_collider.c b/src/api/l_physics_collider.c
index 41f38756..6d2b297b 100644
--- a/src/api/l_physics_collider.c
+++ b/src/api/l_physics_collider.c
@@ -94,27 +94,9 @@ static int l_lovrColliderGetJoints(lua_State* L) {
   return 1;
 }
 
-static void luax_pushcolliderstash(lua_State* L) {
-  lua_getfield(L, LUA_REGISTRYINDEX, "_lovrcolliderstash");
-
-  if (lua_isnil(L, -1)) {
-    lua_newtable(L);
-    lua_replace(L, -2);
-
-    // metatable
-    lua_newtable(L);
-    lua_pushliteral(L, "k");
-    lua_setfield(L, -2, "__mode");
-    lua_setmetatable(L, -2);
-
-    lua_pushvalue(L, -1);
-    lua_setfield(L, LUA_REGISTRYINDEX, "_lovrcolliderstash");
-  }
-}
-
 static int l_lovrColliderGetUserData(lua_State* L) {
   luax_checktype(L, 1, Collider);
-  luax_pushcolliderstash(L);
+  luax_pushstash(L, "lovr.collider.userdata");
   lua_pushvalue(L, 1);
   lua_rawget(L, -2);
   return 1;
@@ -122,7 +104,7 @@ static int l_lovrColliderGetUserData(lua_State* L) {
 
 static int l_lovrColliderSetUserData(lua_State* L) {
   luax_checktype(L, 1, Collider);
-  luax_pushcolliderstash(L);
+  luax_pushstash(L, "lovr.collider.userdata");
   lua_pushvalue(L, 1);
   lua_pushvalue(L, 2);
   lua_rawset(L, -3);
diff --git a/src/api/l_physics_joints.c b/src/api/l_physics_joints.c
index 768f6d42..2b7c06a1 100644
--- a/src/api/l_physics_joints.c
+++ b/src/api/l_physics_joints.c
@@ -63,27 +63,9 @@ static int l_lovrJointGetColliders(lua_State* L) {
   return 2;
 }
 
-static void luax_pushjointstash(lua_State* L) {
-  lua_getfield(L, LUA_REGISTRYINDEX, "_lovrjointstash");
-
-  if (lua_isnil(L, -1)) {
-    lua_newtable(L);
-    lua_replace(L, -2);
-
-    // metatable
-    lua_newtable(L);
-    lua_pushliteral(L, "k");
-    lua_setfield(L, -2, "__mode");
-    lua_setmetatable(L, -2);
-
-    lua_pushvalue(L, -1);
-    lua_setfield(L, LUA_REGISTRYINDEX, "_lovrjointstash");
-  }
-}
-
 static int l_lovrJointGetUserData(lua_State* L) {
   luax_checktype(L, 1, Joint);
-  luax_pushjointstash(L);
+  luax_pushstash(L, "lovr.joint.userdata");
   lua_pushvalue(L, 1);
   lua_rawget(L, -2);
   return 1;
@@ -91,7 +73,7 @@ static int l_lovrJointGetUserData(lua_State* L) {
 
 static int l_lovrJointSetUserData(lua_State* L) {
   luax_checktype(L, 1, Joint);
-  luax_pushjointstash(L);
+  luax_pushstash(L, "lovr.joint.userdata");
   lua_pushvalue(L, 1);
   lua_pushvalue(L, 2);
   lua_rawset(L, -3);
diff --git a/src/api/l_physics_shapes.c b/src/api/l_physics_shapes.c
index 66e4a7ae..08fd3410 100644
--- a/src/api/l_physics_shapes.c
+++ b/src/api/l_physics_shapes.c
@@ -240,27 +240,9 @@ static int l_lovrShapeGetType(lua_State* L) {
   return 1;
 }
 
-static void luax_pushshapestash(lua_State* L) {
-  lua_getfield(L, LUA_REGISTRYINDEX, "_lovrshapestash");
-
-  if (lua_isnil(L, -1)) {
-    lua_newtable(L);
-    lua_replace(L, -2);
-
-    // metatable
-    lua_newtable(L);
-    lua_pushliteral(L, "k");
-    lua_setfield(L, -2, "__mode");
-    lua_setmetatable(L, -2);
-
-    lua_pushvalue(L, -1);
-    lua_setfield(L, LUA_REGISTRYINDEX, "_lovrshapestash");
-  }
-}
-
 static int l_lovrShapeGetUserData(lua_State* L) {
   luax_checktype(L, 1, Shape);
-  luax_pushshapestash(L);
+  luax_pushstash(L, "lovr.shape.userdata");
   lua_pushvalue(L, 1);
   lua_rawget(L, -2);
   return 1;
@@ -268,7 +250,7 @@ static int l_lovrShapeGetUserData(lua_State* L) {
 
 static int l_lovrShapeSetUserData(lua_State* L) {
   luax_checktype(L, 1, Shape);
-  luax_pushshapestash(L);
+  luax_pushstash(L, "lovr.shape.userdata");
   lua_pushvalue(L, 1);
   lua_pushvalue(L, 2);
   lua_rawset(L, -3);