diff --git a/src/engine.js b/src/engine.js
index 0bc0cb5..3ec04d8 100644
--- a/src/engine.js
+++ b/src/engine.js
@@ -4842,71 +4842,6 @@ var XPathJS = (function(){
 
 			},
 
-			/**
-			 * Alias of format-date
-			 *
-			 * @see http://opendatakit.org/help/form-design/binding/
-			 * @param {Object} a
-			 * @param {Object} b
-			 * @return {StringType}
-			 */
-			'format-date-time' : {
-
-				fn: function(dateO, format)
-				{
-					var i,j, 
-						dateO = new DateType(dateO), //not sure why this did not happen automatically
-						date = dateO.toDate(),
-						result = format.toString(),
-						intPad = function(num, l)
-						{
-							var str = num.toString(),
-								zeros = l - str.length;
-							for (j=0 ; j < zeros ; j++)
-							{
-								str = '0'+str;
-							}
-							return str;
-						};
-
-					if (!dateO.toBoolean())
-					{
-						return new StringType(date.toString());
-					}
-
-					props = {
-						'Y' : date.getFullYear(),
-						'y'	: date.getFullYear().toString().substring(2,4),
-						'm'	: intPad((date.getMonth()+1), 2),
-						'n' : date.getMonth()+1,
-						'b'	: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"][date.getMonth()],
-						'd'	: intPad(date.getDate(), 2),
-						'e'	: date.getDate(),
-						'H'	: intPad(date.getHours(), 2),
-						'h'	: date.getHours(),
-						'M'	: intPad(date.getMinutes(), 2),
-						'S'	: intPad(date.getSeconds(), 2),
-						'3'	: intPad(date.getMilliseconds(), 3),
-						'a' : ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"][date.getDay()]
-					}
-
-					for (prop in props)
-					{
-						result = result.replace('%'+prop, props[prop]);
-					}
-
-					return new StringType(result);
-				},
-
-				args: [
-					{t: 'date'},
-					{t: 'string'}
-				],
-
-				ret: 'string'
-
-			},
-
 			/**
 			 * The pow function returns exponentiated result
 			 * arguments provided.
@@ -5447,6 +5382,10 @@ var XPathJS = (function(){
 			}*/
 		}
 	}
+	/**
+	 * Alias functions
+	 */
+	functions[""]['format-date-time'] = functions[""]['format-date'];
 	
 	/**
 	 * Evaluate parsed expression tree.