diff --git a/dataframe-arrow/src/main/kotlin/org/jetbrains/kotlinx/dataframe/io/arrowReadingImpl.kt b/dataframe-arrow/src/main/kotlin/org/jetbrains/kotlinx/dataframe/io/arrowReadingImpl.kt
index 2ae863c2b2..842551d534 100644
--- a/dataframe-arrow/src/main/kotlin/org/jetbrains/kotlinx/dataframe/io/arrowReadingImpl.kt
+++ b/dataframe-arrow/src/main/kotlin/org/jetbrains/kotlinx/dataframe/io/arrowReadingImpl.kt
@@ -317,7 +317,7 @@ internal fun DataFrame.Companion.readArrowImpl(
                         add(df)
                     }
                 }
-                is ArrowStreamReader -> {
+                else -> {
                     val root = reader.vectorSchemaRoot
                     val schema = root.schema
                     while (reader.loadNextBatch()) {