diff --git a/lib/ComicBook.js b/lib/ComicBook.js
index f20da21..303d0bf 100755
--- a/lib/ComicBook.js
+++ b/lib/ComicBook.js
@@ -593,6 +593,8 @@ function ComicBook(id, srcs, opts) {
 		 */
 		sharpen: function (params) {
 			
+			this.desharpen();
+			
 			var opts = merge({ amount: 0 }, params);
 			
 			options.enhance.sharpen = opts;
@@ -602,6 +604,11 @@ function ComicBook(id, srcs, opts) {
 			});
 			
 			init();
+		},
+		
+		desharpen: function() {
+			delete options.enhance.sharpen;
+			ComicBook.prototype.drawPage();
 		}
 	};