diff --git a/gnu/packages/ntp.scm b/gnu/packages/ntp.scm
index 4ae25450e8..8b4f53d4d3 100644
--- a/gnu/packages/ntp.scm
+++ b/gnu/packages/ntp.scm
@@ -42,10 +42,14 @@
    (version "4.2.8p7")
    (source (origin
 	    (method url-fetch)
-	    (uri (string-append
-                  "http://archive.ntp.org/ntp4/ntp-"
-                  (version-major+minor version)
-                  "/ntp-" version ".tar.gz"))
+	    (uri (list (string-append
+                         "http://archive.ntp.org/ntp4/ntp-"
+                         (version-major+minor version)
+                         "/ntp-" version ".tar.gz")
+                       (string-append
+                         "https://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-"
+                         (version-major+minor version)
+                         "/ntp-" version ".tar.gz")))
 	    (sha256
 	     (base32
               "1p100856h17nb0kpnppy70nja57hbcc95h7shhxvw6mhl030rll1"))