diff --git a/src/service.rs b/src/service.rs
index b5f356aa..07a48520 100644
--- a/src/service.rs
+++ b/src/service.rs
@@ -153,17 +153,17 @@ impl Services {
                     },
                 ),
                 state_cache: rooms::state_cache::Service::new(db),
-                state_compressor: rooms::state_compressor::Service {
+                state_compressor: rooms::state_compressor::Service::new(
                     db,
                     #[allow(
                         clippy::as_conversions,
                         clippy::cast_sign_loss,
                         clippy::cast_possible_truncation
                     )]
-                    stateinfo_cache: StdMutex::new(LruCache::new(
-                        (100.0 * config.cache_capacity_modifier) as usize,
-                    )),
-                },
+                    {
+                        (100.0 * config.cache_capacity_modifier) as usize
+                    },
+                ),
                 timeline: rooms::timeline::Service::new(
                     db,
                     config.pdu_cache_capacity,
diff --git a/src/service/rooms/state_compressor.rs b/src/service/rooms/state_compressor.rs
index 4232a325..cac73fe0 100644
--- a/src/service/rooms/state_compressor.rs
+++ b/src/service/rooms/state_compressor.rs
@@ -72,6 +72,16 @@ impl CompressedStateEvent {
 }
 
 impl Service {
+    pub(crate) fn new(
+        db: &'static dyn Data,
+        stateinfo_cache_size: usize,
+    ) -> Self {
+        Self {
+            db,
+            stateinfo_cache: Mutex::new(LruCache::new(stateinfo_cache_size)),
+        }
+    }
+
     /// Returns a stack with info on shortstatehash, full state, added diff and
     /// removed diff for the selected shortstatehash and each parent layer.
     #[allow(clippy::type_complexity)]