diff --git a/nd4s/src/main/scala/org/nd4s/samediff/SameDiff.scala b/nd4s/src/main/scala/org/nd4s/samediff/SameDiff.scala
index e72ca37ed..79a185a68 100644
--- a/nd4s/src/main/scala/org/nd4s/samediff/SameDiff.scala
+++ b/nd4s/src/main/scala/org/nd4s/samediff/SameDiff.scala
@@ -63,7 +63,7 @@ case class SDIndexWrapper(end: Long) {
 case class SDIndexWrapper1(start: Int) {
 
   def ::(end: Int): SDIndex =
-    SDIndex.interval(start, end)
+    SDIndex.interval(start.toLong, end.toLong)
 }
 
 object --- extends SDIndex {