diff --git a/platform/configuration-store-impl/src/StateMap.kt b/platform/configuration-store-impl/src/StateMap.kt
index dc7eac61c3c3..d0d1e5e43ba4 100644
--- a/platform/configuration-store-impl/src/StateMap.kt
+++ b/platform/configuration-store-impl/src/StateMap.kt
@@ -119,7 +119,7 @@ class StateMap private constructor(private val names: Array<String>, private val
 
   fun getElement(key: String, newLiveStates: Map<String, Element>? = null) = stateToElement(key, get(key), newLiveStates)
 
-  fun isEmpty() = names.isEmpty()
+  fun isEmpty(): Boolean = names.isEmpty()
 
   fun hasState(key: String) = get(key) is Element