diff --git a/DNCL3.js b/DNCL3.js
index 22f054b..8f9a7cd 100644
--- a/DNCL3.js
+++ b/DNCL3.js
@@ -525,7 +525,7 @@ export class DNCL3 {
         test: {
           type: "BinaryExpression",
           left: astvar,
-          operator: step.value > 0 ? "<" : ">",
+          operator: step.value > 0 ? "<=" : ">=",
           right: endval,
         },
         update: {