diff --git a/idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/FirModuleResolveStateImpl.kt b/idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/FirModuleResolveStateImpl.kt
index e1daee5bd9c..cc94a776c78 100644
--- a/idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/FirModuleResolveStateImpl.kt
+++ b/idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/FirModuleResolveStateImpl.kt
@@ -85,6 +85,10 @@ internal class FirModuleResolveStateImpl(
      * [ktDeclaration] should be either [KtDeclaration] or [KtLambdaExpression]
      */
     private fun findSourceFirDeclarationByExpression(ktDeclaration: KtExpression): FirDeclaration {
+        require(ktDeclaration.getModuleInfo() is ModuleSourceInfo) {
+            "Declaration should have ModuleSourceInfo, instead it had ${ktDeclaration.getModuleInfo()}"
+        }
+
         val nonLocalNamedDeclaration = ktDeclaration.getNonLocalContainingOrThisDeclaration()
             ?: error("Declaration should have non-local container${ktDeclaration.getElementTextInContext()}")