diff --git a/epub.js/js/reader.js b/epub.js/js/reader.js
index 047e344..db8439a 100644
--- a/epub.js/js/reader.js
+++ b/epub.js/js/reader.js
@@ -3344,6 +3344,7 @@ EPUBJS.Reader.prototype.adjustFontSize = function(e) {
 
 	if(!this.settings.styles) return;
 
+    /*
 	if(!this.settings.styles.fontSize) {
 		this.settings.styles.fontSize = "100%";
 	}
@@ -3366,6 +3367,7 @@ EPUBJS.Reader.prototype.adjustFontSize = function(e) {
 		e.preventDefault();
 		this.book.setStyle("fontSize", "100%");
 	}
+    */
 };
 
 EPUBJS.Reader.prototype.addBookmark = function(cfi) {
@@ -4369,4 +4371,4 @@ EPUBJS.reader.TocController = function(toc) {
 	};
 };
 
-//# sourceMappingURL=reader.js.map
\ No newline at end of file
+//# sourceMappingURL=reader.js.map