diff --git a/runtime/src/jet/IntRange.java b/runtime/src/jet/IntRange.java
index cf24a09fc5d..5397db80aea 100644
--- a/runtime/src/jet/IntRange.java
+++ b/runtime/src/jet/IntRange.java
@@ -30,6 +30,15 @@ public final class IntRange implements Range<Integer>, IntIterable {
         this.count = count;
     }
 
+    @Override
+    public String toString() {
+        if (count >= 0) {
+            return "" + getStart() + ".upto(" + getEnd() + ")";
+        } else {
+            return "" + getStart() + ".downto(" + getEnd() + ")";
+        }
+    }
+
     @Override
     public boolean contains(Integer item) {
         if (item == null) return false;