diff --git a/scheme/httpd/surflets/web-server/root/surflets/add2.scm b/scheme/httpd/surflets/web-server/root/surflets/add2.scm
index c19da03..6b2e295 100644
--- a/scheme/httpd/surflets/web-server/root/surflets/add2.scm
+++ b/scheme/httpd/surflets/web-server/root/surflets/add2.scm
@@ -28,7 +28,7 @@
 			    (URL "add2.scm" "Start new calculation."))))))))
 	(if result
 	    (or (input-field-value number-input-field 
-				   (form-query (http-url-search (request:url result))))
+				   (form-query (http-url-search (request-url result))))
 		(get-number input-text "Please enter a valid number."))
 	    (get-number input-text "Please enter a number."))))