diff --git a/compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/FirConstructor.kt b/compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/FirConstructor.kt
index 42a6f05c1ae..b4ed3eab643 100644
--- a/compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/FirConstructor.kt
+++ b/compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/FirConstructor.kt
@@ -13,6 +13,8 @@ import org.jetbrains.kotlin.fir.visitors.FirVisitor
 @BaseTransformedType
 interface FirConstructor : @VisitedSupertype FirFunction, FirCallableMemberDeclaration {
 
+    val isPrimary: Boolean get() = false
+
     override val isOverride: Boolean get() = status.isOverride
 
     val delegatedConstructor: FirDelegatedConstructorCall?
diff --git a/compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/impl/FirPrimaryConstructorImpl.kt b/compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/impl/FirPrimaryConstructorImpl.kt
index c9f34678fa6..171e9795a7f 100644
--- a/compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/impl/FirPrimaryConstructorImpl.kt
+++ b/compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/impl/FirPrimaryConstructorImpl.kt
@@ -21,4 +21,7 @@ class FirPrimaryConstructorImpl(
     isActual: Boolean,
     delegatedSelfTypeRef: FirTypeRef,
     delegatedConstructor: FirDelegatedConstructorCall?
-) : FirConstructorImpl(session, psi, symbol, visibility, isExpect, isActual, delegatedSelfTypeRef, delegatedConstructor)
\ No newline at end of file
+) : FirConstructorImpl(session, psi, symbol, visibility, isExpect, isActual, delegatedSelfTypeRef, delegatedConstructor) {
+    override val isPrimary: Boolean
+        get() = true
+}
\ No newline at end of file