diff --git a/mar/editor.js b/mar/editor.js
index f88dcd5..9c5b0c9 100644
--- a/mar/editor.js
+++ b/mar/editor.js
@@ -172,7 +172,7 @@ function getOperandType(text, result) {
 
     //Check IMM
     if (!isNaN(Number(text)) && Number(text) === Math.floor(Number(text)) && text.indexOf("o") === -1
-        && text.indexOf("e") === -1) {
+        && text.indexOf("0e") !== 0) {
         return OPERAND_IMM;
     }