diff --git a/compiler/fir/fir-deserialization/src/org/jetbrains/kotlin/fir/resolve/providers/impl/FirBuiltinSymbolProvider.kt b/compiler/fir/fir-deserialization/src/org/jetbrains/kotlin/fir/resolve/providers/impl/FirBuiltinSymbolProvider.kt
index dffb33032b7..b7d97c6ca06 100644
--- a/compiler/fir/fir-deserialization/src/org/jetbrains/kotlin/fir/resolve/providers/impl/FirBuiltinSymbolProvider.kt
+++ b/compiler/fir/fir-deserialization/src/org/jetbrains/kotlin/fir/resolve/providers/impl/FirBuiltinSymbolProvider.kt
@@ -48,7 +48,8 @@ import org.jetbrains.kotlin.utils.addToStdlib.firstNotNullResult
 import org.jetbrains.kotlin.utils.addToStdlib.getOrPut
 import java.io.InputStream
 
-@NoMutableState
+//TODO make thread safe
+@ThreadSafeMutableState
 class FirBuiltinSymbolProvider(session: FirSession, val kotlinScopeProvider: KotlinScopeProvider) : FirSymbolProvider(session) {
 
     private data class SyntheticFunctionalInterfaceSymbolKey(val kind: FunctionClassKind, val arity: Int)