diff --git a/idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceParameter/KotlinIntroduceParameterDialog.kt b/idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceParameter/KotlinIntroduceParameterDialog.kt
index cbe75dba431..4757952c6ce 100644
--- a/idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceParameter/KotlinIntroduceParameterDialog.kt
+++ b/idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceParameter/KotlinIntroduceParameterDialog.kt
@@ -323,7 +323,7 @@ public class KotlinIntroduceParameterDialog private constructor(
 
                     override fun createUsageViewDescriptor(usages: Array<out UsageInfo>) = BaseUsageViewDescriptor()
 
-                    override fun getCommandName() = commandName
+                    override fun getCommandName(): String = commandName
                 }
         )
     }