diff --git a/vendor/box3d/box3d.odin b/vendor/box3d/box3d.odin
index 0e251dddc..569ebeb2b 100644
--- a/vendor/box3d/box3d.odin
+++ b/vendor/box3d/box3d.odin
@@ -389,7 +389,7 @@ foreign lib {
 	World_SetUserData :: proc(worldId: WorldId, userData: rawptr) ---
 
 	// Get the user data pointer.
-	 World_GetUserData :: proc(worldId: WorldId) ---
+	World_GetUserData :: proc(worldId: WorldId) -> rawptr ---
 
 	// Set the friction callback. Passing NULL resets to default.
 	World_SetFrictionCallback :: proc(worldId: WorldId, callback: FrictionCallback) ---