diff --git a/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/PositioningStrategy.kt b/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/PositioningStrategy.kt
index 487acfafdd8..e1023f0d978 100644
--- a/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/PositioningStrategy.kt
+++ b/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/PositioningStrategy.kt
@@ -30,7 +30,7 @@ open class PositioningStrategy<E : PsiElement> {
         return mark(diagnostic.psiElement)
     }
 
-    protected open fun mark(element: E): List<TextRange> {
+    open fun mark(element: E): List<TextRange> {
         return markElement(element)
     }