diff --git a/packages/mathomatic/build.sh b/packages/mathomatic/build.sh
index b42b892d8..deb7c2ce5 100644
--- a/packages/mathomatic/build.sh
+++ b/packages/mathomatic/build.sh
@@ -2,7 +2,8 @@ TERMUX_PKG_HOMEPAGE=http://www.mathomatic.org/
 TERMUX_PKG_DESCRIPTION="Simple CAS and symbolic calculator"
 TERMUX_PKG_VERSION=16.0.5
 TERMUX_PKG_BUILD_REVISION=2
-TERMUX_PKG_SRCURL="http://fossies.org/linux/misc/mathomatic-${TERMUX_PKG_VERSION}.tar.gz"
+TERMUX_PKG_SRCURL="https://fossies.org/linux/misc/old/mathomatic-${TERMUX_PKG_VERSION}.tar.xz"
+TERMUX_PKG_SHA256=7f525bdb2e13006549dd8f17906c26f926f5ac51174f02f074107c612491e05c
 TERMUX_PKG_BUILD_IN_SRC=yes
 TERMUX_PKG_EXTRA_MAKE_ARGS="READLINE=1"
 TERMUX_PKG_DEPENDS="readline"