diff --git a/lib/ace/edit_session.js b/lib/ace/edit_session.js
index 8ab76597..c7260158 100644
--- a/lib/ace/edit_session.js
+++ b/lib/ace/edit_session.js
@@ -1851,7 +1851,7 @@ var EditSession = function(text, mode) {
 
         var isCode = this.$wrapAsCode;
 
-        var indentSubsequentLines = true;
+        var indentSubsequentLines = this.$indentSubsequentLines;
 
         var maxIndent = wrapLimit > 8 ? Math.floor(wrapLimit / 2) : 0;
 
@@ -2552,6 +2552,7 @@ config.defineOptions(EditSession.prototype, "session", {
         },
         initialValue: "auto"
     },
+    indentSubsequentLines: {initialValue: true},
     firstLineNumber: {
         set: function() {this._signal("changeBreakpoint");},
         initialValue: 1