diff --git a/compiler/psi/src/org/jetbrains/kotlin/psi/KtCodeFragment.kt b/compiler/psi/src/org/jetbrains/kotlin/psi/KtCodeFragment.kt
index 57e9a287fba..45f9ab5d41f 100644
--- a/compiler/psi/src/org/jetbrains/kotlin/psi/KtCodeFragment.kt
+++ b/compiler/psi/src/org/jetbrains/kotlin/psi/KtCodeFragment.kt
@@ -145,6 +145,7 @@ abstract class KtCodeFragment(
         if (contextFile != null) {
             if (contextFile.importDirectives.find { it.text == import } == null) {
                 imports.add(import)
+                clearCaches() // Increment the modification stamp
             }
         }
     }