diff --git a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirStatusResolveTransformer.kt b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirStatusResolveTransformer.kt
index ebe1704ae56..f18533d4414 100644
--- a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirStatusResolveTransformer.kt
+++ b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirStatusResolveTransformer.kt
@@ -253,7 +253,7 @@ abstract class AbstractFirStatusResolveTransformer(
     protected abstract fun FirDeclaration.needResolveMembers(): Boolean
     protected abstract fun FirDeclaration.needResolveNestedClassifiers(): Boolean
 
-    protected open fun needReplacePhase(firDeclaration: FirDeclaration) = transformerPhase > firDeclaration.resolvePhase
+    protected open fun needReplacePhase(firDeclaration: FirDeclaration): Boolean = transformerPhase > firDeclaration.resolvePhase
 
     override fun transformFile(file: FirFile, data: FirResolvedDeclarationStatus?): FirFile {
         if (needReplacePhase(file)) {
diff --git a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirSupertypesResolution.kt b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirSupertypesResolution.kt
index a3fc11f5f9e..7b09877ea5e 100644
--- a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirSupertypesResolution.kt
+++ b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirSupertypesResolution.kt
@@ -102,7 +102,7 @@ open class FirApplySupertypesTransformer(
         return element
     }
 
-    protected open fun needReplacePhase(firDeclaration: FirDeclaration) = FirResolvePhase.SUPER_TYPES > firDeclaration.resolvePhase
+    protected open fun needReplacePhase(firDeclaration: FirDeclaration): Boolean = FirResolvePhase.SUPER_TYPES > firDeclaration.resolvePhase
 
     protected open fun transformDeclarationContent(declaration: FirDeclaration, data: Any?): FirDeclaration {
         return declaration.transformChildren(this, null) as FirDeclaration
diff --git a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/body/resolve/FirAbstractBodyResolveTransformer.kt b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/body/resolve/FirAbstractBodyResolveTransformer.kt
index 9d4baca0890..c686ceb4ccc 100644
--- a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/body/resolve/FirAbstractBodyResolveTransformer.kt
+++ b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/body/resolve/FirAbstractBodyResolveTransformer.kt
@@ -43,7 +43,7 @@ abstract class FirAbstractBodyResolveTransformer(phase: FirResolvePhase) : FirAb
 
     final override val session: FirSession get() = components.session
 
-    protected open fun needReplacePhase(firDeclaration: FirDeclaration) = transformerPhase > firDeclaration.resolvePhase
+    protected open fun needReplacePhase(firDeclaration: FirDeclaration): Boolean = transformerPhase > firDeclaration.resolvePhase
 
     fun replaceDeclarationResolvePhaseIfNeeded(firDeclaration: FirDeclaration, newResolvePhase: FirResolvePhase) {
         if (needReplacePhase(firDeclaration) && newResolvePhase > firDeclaration.resolvePhase) {