diff --git a/srcpkgs/ModemManager/patches/no-XCASE.patch b/srcpkgs/ModemManager/patches/no-XCASE.patch
new file mode 100644
index 0000000000..e337b36b74
--- /dev/null
+++ b/srcpkgs/ModemManager/patches/no-XCASE.patch
@@ -0,0 +1,35 @@
+## http://man7.org/linux/man-pages/man3/termios.3.html
+## XCASE  (not in POSIX; not supported under Linux)
+--- libqcdm/src/com.c
++++ libqcdm/src/com.c
+@@ -39,7 +39,7 @@
+     stbuf.c_iflag &= ~(HUPCL | IUTF8 | IUCLC | ISTRIP | IXON | IXOFF | IXANY | ICRNL);
+     stbuf.c_oflag &= ~(OPOST | OCRNL | ONLCR | OLCUC | ONLRET);
+     stbuf.c_lflag &= ~(ICANON | ISIG | IEXTEN | ECHO | ECHOE | ECHOK | ECHONL);
+-    stbuf.c_lflag &= ~(NOFLSH | XCASE | TOSTOP | ECHOPRT | ECHOCTL | ECHOKE);
++    stbuf.c_lflag &= ~(NOFLSH | TOSTOP | ECHOPRT | ECHOCTL | ECHOKE);
+     stbuf.c_cc[VMIN] = 1;
+     stbuf.c_cc[VTIME] = 0;
+     stbuf.c_cc[VEOF] = 1;
+--- libwmc/src/com.c
++++ libwmc/src/com.c
+@@ -39,7 +39,7 @@
+     stbuf.c_iflag &= ~(HUPCL | IUTF8 | IUCLC | ISTRIP | IXON | IXOFF | IXANY | ICRNL);
+     stbuf.c_oflag &= ~(OPOST | OCRNL | ONLCR | OLCUC | ONLRET);
+     stbuf.c_lflag &= ~(ICANON | ISIG | IEXTEN | ECHO | ECHOE | ECHOK | ECHONL);
+-    stbuf.c_lflag &= ~(NOFLSH | XCASE | TOSTOP | ECHOPRT | ECHOCTL | ECHOKE);
++    stbuf.c_lflag &= ~(NOFLSH | TOSTOP | ECHOPRT | ECHOCTL | ECHOKE);
+     stbuf.c_cc[VMIN] = 1;
+     stbuf.c_cc[VTIME] = 0;
+     stbuf.c_cc[VEOF] = 1;
+--- src/mm-port-serial.c
++++ src/mm-port-serial.c
+@@ -455,7 +455,7 @@
+ 
+     stbuf.c_iflag &= ~(IGNCR | ICRNL | IUCLC | INPCK | IXON | IXANY );
+     stbuf.c_oflag &= ~(OPOST | OLCUC | OCRNL | ONLCR | ONLRET);
+-    stbuf.c_lflag &= ~(ICANON | XCASE | ECHO | ECHOE | ECHONL);
++    stbuf.c_lflag &= ~(ICANON | ECHO | ECHOE | ECHONL);
+     stbuf.c_lflag &= ~(ECHO | ECHOE);
+     stbuf.c_cc[VMIN] = 1;
+     stbuf.c_cc[VTIME] = 0;
diff --git a/srcpkgs/ModemManager/template b/srcpkgs/ModemManager/template
index 38dc915443..bf3ee59ce3 100644
--- a/srcpkgs/ModemManager/template
+++ b/srcpkgs/ModemManager/template
@@ -1,7 +1,7 @@
 # Template file for 'ModemManager'
 pkgname=ModemManager
 version=1.4.8
-revision=1
+revision=2
 build_options="gir systemd"
 build_style=gnu-configure
 configure_args="--disable-static --sbindir=/usr/bin