diff --git a/js/api/api.ajax.js b/js/api/api.ajax.js
index 49aa7be13..99c28da5c 100644
--- a/js/api/api.ajax.js
+++ b/js/api/api.ajax.js
@@ -1,6 +1,11 @@
 
 
 var __reload = function ( settings, holdPosition, callback ) {
+	// Not an ajax source - abort
+	if ( settings.ajax == null ) {
+		return;
+	}
+
 	// Use the draw event to trigger a callback
 	if ( callback ) {
 		var api = new _Api( settings );
diff --git a/js/core/core.ajax.js b/js/core/core.ajax.js
index 7ba6b4115..cf4c5f5ba 100644
--- a/js/core/core.ajax.js
+++ b/js/core/core.ajax.js
@@ -76,6 +76,7 @@ function _fnBuildAjax( oSettings, data, fn )
 
 		// Remove the data property as we've resolved it already and don't want
 		// jQuery to do it again (it is restored at the end of the function)
+		ajax.data = null; // or undefined - for IE / Safari
 		delete ajax.data;
 	}
 
@@ -136,8 +137,10 @@ function _fnBuildAjax( oSettings, data, fn )
 		// Object to extend the base settings
 		oSettings.jqXHR = $.ajax( $.extend( baseAjax, ajax ) );
 
-		// Restore for next time around
-		ajax.data = ajaxData;
+		if (ajax && ajaxData) {
+			// Restore for next time around
+			ajax.data = ajaxData;
+		}
 	}
 }