diff --git a/idea/src/org/jetbrains/kotlin/idea/inspections/UnusedImportInspection.kt b/idea/src/org/jetbrains/kotlin/idea/inspections/UnusedImportInspection.kt
index d1d3be25672..43b7434ab3c 100644
--- a/idea/src/org/jetbrains/kotlin/idea/inspections/UnusedImportInspection.kt
+++ b/idea/src/org/jetbrains/kotlin/idea/inspections/UnusedImportInspection.kt
@@ -122,7 +122,9 @@ class UnusedImportInspection : AbstractKotlinInspection() {
             }
         }
 
-        scheduleOptimizeImportsOnTheFly(file, descriptorsToImport)
+        if (isOnTheFly) {
+            scheduleOptimizeImportsOnTheFly(file, descriptorsToImport)
+        }
 
         return problems.toTypedArray()
     }