diff --git a/plugins/kotlin/refactorings/kotlin.refactorings.move.k2/src/org/jetbrains/kotlin/idea/k2/refactoring/move/ui/K2MoveModel.kt b/plugins/kotlin/refactorings/kotlin.refactorings.move.k2/src/org/jetbrains/kotlin/idea/k2/refactoring/move/ui/K2MoveModel.kt
index d5f3135d95a3..fa65f7a0f3c7 100644
--- a/plugins/kotlin/refactorings/kotlin.refactorings.move.k2/src/org/jetbrains/kotlin/idea/k2/refactoring/move/ui/K2MoveModel.kt
+++ b/plugins/kotlin/refactorings/kotlin.refactorings.move.k2/src/org/jetbrains/kotlin/idea/k2/refactoring/move/ui/K2MoveModel.kt
@@ -1,4 +1,4 @@
-// Copyright 2000-2023 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+// Copyright 2000-2024 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package org.jetbrains.kotlin.idea.k2.refactoring.move.ui
 
 import com.intellij.openapi.editor.Editor
@@ -50,6 +50,7 @@ sealed class K2MoveModel {
             } ?: false
         }
         if (source.elements.isEmpty()) return false
+        if (target is K2MoveTargetModel.File && !(target as K2MoveTargetModel.File).fileName.isValidKotlinFile()) return false
         val files = source.elements.map { it.containingKtFile }.toSet()
         return files.size != 1 || !files.single().isTargetFile()
     }
diff --git a/plugins/kotlin/refactorings/kotlin.refactorings.move.k2/src/org/jetbrains/kotlin/idea/k2/refactoring/move/ui/K2MoveTargetModel.kt b/plugins/kotlin/refactorings/kotlin.refactorings.move.k2/src/org/jetbrains/kotlin/idea/k2/refactoring/move/ui/K2MoveTargetModel.kt
index 0b976ae5cfe5..db20f3f0f86a 100644
--- a/plugins/kotlin/refactorings/kotlin.refactorings.move.k2/src/org/jetbrains/kotlin/idea/k2/refactoring/move/ui/K2MoveTargetModel.kt
+++ b/plugins/kotlin/refactorings/kotlin.refactorings.move.k2/src/org/jetbrains/kotlin/idea/k2/refactoring/move/ui/K2MoveTargetModel.kt
@@ -1,4 +1,4 @@
-// Copyright 2000-2023 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+// Copyright 2000-2024 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package org.jetbrains.kotlin.idea.k2.refactoring.move.ui
 
 import com.intellij.ide.util.DirectoryChooser
@@ -131,6 +131,11 @@ sealed interface K2MoveTargetModel {
                 fileChooser.addDocumentListener(object : DocumentAdapter() {
                     override fun textChanged(e: DocumentEvent) {
                         fileName = fileChooser.text
+                        if (!fileName.isValidKotlinFile()) {
+                            onError(KotlinBundle.message("refactoring.move.non.kotlin.file"), fileChooser)
+                        } else {
+                            onError(null, fileChooser)
+                        }
                         revalidateButtons()
                     }
                 })
diff --git a/plugins/kotlin/refactorings/kotlin.refactorings.move.k2/src/org/jetbrains/kotlin/idea/k2/refactoring/move/ui/moveUiUtil.kt b/plugins/kotlin/refactorings/kotlin.refactorings.move.k2/src/org/jetbrains/kotlin/idea/k2/refactoring/move/ui/moveUiUtil.kt
new file mode 100644
index 000000000000..39b476f2de9b
--- /dev/null
+++ b/plugins/kotlin/refactorings/kotlin.refactorings.move.k2/src/org/jetbrains/kotlin/idea/k2/refactoring/move/ui/moveUiUtil.kt
@@ -0,0 +1,8 @@
+// Copyright 2000-2024 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package org.jetbrains.kotlin.idea.k2.refactoring.move.ui
+
+import org.jetbrains.kotlin.idea.KotlinLanguage
+
+internal fun String.isValidKotlinFile(): Boolean {
+    return endsWith(KotlinLanguage.INSTANCE.associatedFileType?.defaultExtension ?: return false) || endsWith(".kts")
+}
\ No newline at end of file