diff --git a/package/armadillo/armadillo.mk b/package/armadillo/armadillo.mk
index 714c1b2ddf..beb60c8c64 100644
--- a/package/armadillo/armadillo.mk
+++ b/package/armadillo/armadillo.mk
@@ -5,7 +5,9 @@
 ################################################################################
 
 ARMADILLO_VERSION = 6.500.4
-ARMADILLO_SITE = http://downloads.sourceforge.net/project/arma
+# upstream removed tarball from
+# http://downloads.sourceforge.net/project/arma
+ARMADILLO_SITE = https://ftp.fau.de/macports/distfiles/armadillo
 ARMADILLO_DEPENDENCIES = clapack
 ARMADILLO_INSTALL_STAGING = YES
 ARMADILLO_LICENSE = MPL-2.0