diff --git a/server/src/lib.rs b/server/src/lib.rs
index 0e7d529931..cdc808259b 100644
--- a/server/src/lib.rs
+++ b/server/src/lib.rs
@@ -362,7 +362,10 @@ impl Server {
         let connection_handler = ConnectionHandler::new(network);
 
         // Initiate real-time world simulation
+        #[cfg(feature = "worldgen")]
         rtsim::init(&mut state, &world);
+        #[cfg(not(feature = "worldgen"))]
+        rtsim::init(&mut state);
 
         let this = Self {
             state,
@@ -503,6 +506,7 @@ impl Server {
             dt,
             |dispatcher_builder| {
                 sys::add_server_systems(dispatcher_builder);
+                #[cfg(feature = "worldgen")]
                 rtsim::add_server_systems(dispatcher_builder);
             },
             false,
diff --git a/server/src/rtsim/mod.rs b/server/src/rtsim/mod.rs
index 0e9665f99e..0aab0f6704 100644
--- a/server/src/rtsim/mod.rs
+++ b/server/src/rtsim/mod.rs
@@ -82,8 +82,11 @@ pub fn add_server_systems(dispatch_builder: &mut DispatcherBuilder) {
     dispatch_builder.add(tick::Sys, TICK_SYS, &[LOAD_CHUNK_SYS, UNLOAD_CHUNK_SYS]);
 }
 
-pub fn init(state: &mut State, world: &world::World) {
+pub fn init(state: &mut State, #[cfg(feature = "worldgen")] world: &world::World) {
+    #[cfg(feature = "worldgen")]
     let mut rtsim = RtSim::new(world.sim().get_size());
+    #[cfg(not(feature = "worldgen"))]
+    let mut rtsim = RtSim::new(Vec2::new(40, 40));
 
     for _ in 0..2500 {
         let pos = rtsim