diff --git a/compiler/fir/java/src/org/jetbrains/kotlin/fir/java/scopes/JavaOverrideChecker.kt b/compiler/fir/java/src/org/jetbrains/kotlin/fir/java/scopes/JavaOverrideChecker.kt
index 1c0d6783b3b..735530875fe 100644
--- a/compiler/fir/java/src/org/jetbrains/kotlin/fir/java/scopes/JavaOverrideChecker.kt
+++ b/compiler/fir/java/src/org/jetbrains/kotlin/fir/java/scopes/JavaOverrideChecker.kt
@@ -37,7 +37,7 @@ class JavaOverrideChecker internal constructor(
         }
     }
 
-    override fun isEqualTypes(candidateTypeRef: FirTypeRef, baseTypeRef: FirTypeRef, substitutor: ConeSubstitutor) =
+    private fun isEqualTypes(candidateTypeRef: FirTypeRef, baseTypeRef: FirTypeRef, substitutor: ConeSubstitutor) =
         isEqualTypes(
             candidateTypeRef.toConeKotlinTypeProbablyFlexible(session, javaTypeParameterStack),
             baseTypeRef.toConeKotlinTypeProbablyFlexible(session, javaTypeParameterStack),
diff --git a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/scopes/impl/FirAbstractOverrideChecker.kt b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/scopes/impl/FirAbstractOverrideChecker.kt
index 80c5c333fda..6a6613c9aa9 100644
--- a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/scopes/impl/FirAbstractOverrideChecker.kt
+++ b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/scopes/impl/FirAbstractOverrideChecker.kt
@@ -14,8 +14,6 @@ import org.jetbrains.kotlin.fir.types.impl.ConeTypeParameterTypeImpl
 
 abstract class FirAbstractOverrideChecker : FirOverrideChecker {
 
-    protected abstract fun isEqualTypes(candidateTypeRef: FirTypeRef, baseTypeRef: FirTypeRef, substitutor: ConeSubstitutor): Boolean
-
     protected abstract fun buildTypeParametersSubstitutorIfCompatible(
         overrideCandidate: FirCallableMemberDeclaration<*>,
         baseDeclaration: FirCallableMemberDeclaration<*>
diff --git a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/scopes/impl/FirStandardOverrideChecker.kt b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/scopes/impl/FirStandardOverrideChecker.kt
index dc50ddd3560..ec62dfa1ce6 100644
--- a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/scopes/impl/FirStandardOverrideChecker.kt
+++ b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/scopes/impl/FirStandardOverrideChecker.kt
@@ -51,7 +51,7 @@ class FirStandardOverrideChecker(session: FirSession) : FirAbstractOverrideCheck
         else -> this
     }
 
-    override fun isEqualTypes(candidateTypeRef: FirTypeRef, baseTypeRef: FirTypeRef, substitutor: ConeSubstitutor) =
+    fun isEqualTypes(candidateTypeRef: FirTypeRef, baseTypeRef: FirTypeRef, substitutor: ConeSubstitutor) =
         isEqualTypes(candidateTypeRef.coneType, baseTypeRef.coneType, substitutor)