diff --git a/analysis/project-structure/src/org/jetbrains/kotlin/analysis/project/structure/ProjectStructureProvider.kt b/analysis/project-structure/src/org/jetbrains/kotlin/analysis/project/structure/ProjectStructureProvider.kt
index 19a4740567e..f7b52108a50 100644
--- a/analysis/project-structure/src/org/jetbrains/kotlin/analysis/project/structure/ProjectStructureProvider.kt
+++ b/analysis/project-structure/src/org/jetbrains/kotlin/analysis/project/structure/ProjectStructureProvider.kt
@@ -37,4 +37,4 @@ public inline fun <reified M : KtModule> PsiElement.getKtModuleOfType(project: P
  * @param project [Project] which contains current [PsiElement]. `PsiElement.project` may be a heavy operation as it includes PSI tree traversal. So, when a [Project] is  already available, it is better to pass it explicitly
  */
 public inline fun <reified M : KtModule> PsiElement.getKtModuleOfTypeSafe(project: Project = this.project): M? =
-    getKtModule(project) as M?
+    getKtModule(project) as? M