diff --git a/platform/analysis-impl/src/com/intellij/codeInspection/ex/InspectionToolRegistrar.kt b/platform/analysis-impl/src/com/intellij/codeInspection/ex/InspectionToolRegistrar.kt
index de57cbf7f61a..19664762fecb 100644
--- a/platform/analysis-impl/src/com/intellij/codeInspection/ex/InspectionToolRegistrar.kt
+++ b/platform/analysis-impl/src/com/intellij/codeInspection/ex/InspectionToolRegistrar.kt
@@ -41,7 +41,7 @@ class InspectionToolRegistrar : InspectionToolsSupplier() {
     }
   }
 
-  private val toolFactories: MutableCollection<MutableList<InspectionFactory>>
+  private val toolFactories: Collection<List<InspectionFactory>>
 
   init {
     val app = ApplicationManager.getApplication()