diff --git a/src/subParsers/makemarkdown/table.js b/src/subParsers/makemarkdown/table.js
index 1fb1f94..d84e64b 100644
--- a/src/subParsers/makemarkdown/table.js
+++ b/src/subParsers/makemarkdown/table.js
@@ -55,7 +55,7 @@ showdown.subParser('makeMarkdown.table', function (node, globals) {
     for (ii = 0; ii < tableArray[i].length; ++ii) {
       if (i === 1) {
         if (tableArray[i][ii].slice(-1) === ':') {
-          tableArray[i][ii] = showdown.helper.padEnd(tableArray[i][ii].slice(-1), cellSpacesCount - 1, '-') + ':';
+          tableArray[i][ii] = showdown.helper.padEnd(tableArray[i][ii].slice(0, -1), cellSpacesCount - 1, '-') + ':';
         } else {
           tableArray[i][ii] = showdown.helper.padEnd(tableArray[i][ii], cellSpacesCount, '-');
         }