diff --git a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirCommonConstructorDelegationIssuesChecker.kt b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirCommonConstructorDelegationIssuesChecker.kt
index 989abef2da3..b2a34c35c19 100644
--- a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirCommonConstructorDelegationIssuesChecker.kt
+++ b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirCommonConstructorDelegationIssuesChecker.kt
@@ -17,9 +17,12 @@ import org.jetbrains.kotlin.fir.references.*
 import org.jetbrains.kotlin.fir.resolve.diagnostics.ConeAmbiguityError
 import org.jetbrains.kotlin.fir.symbols.SymbolInternals
 import org.jetbrains.kotlin.fir.symbols.lazyResolveToPhase
+import org.jetbrains.kotlin.utils.addToStdlib.lastIsInstanceOrNull
 
 object FirCommonConstructorDelegationIssuesChecker : FirRegularClassChecker() {
     override fun check(declaration: FirRegularClass, context: CheckerContext, reporter: DiagnosticReporter) {
+        val containingClass = context.containingDeclarations.lastIsInstanceOrNull<FirRegularClass>()
+        if (declaration.isEffectivelyExternal(containingClass, context)) return
         val cyclicConstructors = mutableSetOf<FirConstructor>()
         var hasPrimaryConstructor = false
         val isEffectivelyExpect = declaration.isEffectivelyExpect(context.containingDeclarations.lastOrNull() as? FirRegularClass, context)