diff --git a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/FirArgumentsToParametersMapper.kt b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/FirArgumentsToParametersMapper.kt
index 56c4f27804f..bc203ac3da9 100644
--- a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/FirArgumentsToParametersMapper.kt
+++ b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/FirArgumentsToParametersMapper.kt
@@ -331,7 +331,4 @@ private class FirCallArgumentsProcessor(
 
     private val parameters: List<FirValueParameter>
         get() = function.valueParameters
-
-    private val FirExpression.argumentName: Name?
-        get() = (this as? FirNamedArgumentExpression)?.name
 }