diff --git a/srcpkgs/gstreamermm/patches/gstreamermm-1.10.0-no-volatile.patch b/srcpkgs/gstreamermm/patches/gstreamermm-1.10.0-no-volatile.patch
new file mode 100644
index 00000000000..ede9f910ae1
--- /dev/null
+++ b/srcpkgs/gstreamermm/patches/gstreamermm-1.10.0-no-volatile.patch
@@ -0,0 +1,17 @@
+https://bugs.gentoo.org/786444
+
+g_once_init_enter(void*) should NOT be passed a volatile argument:
+https://developer.gnome.org/glib/stable/glib-Threads.html#g-once-init-enter
+"While location has a volatile qualifier, this is a historical
+artifact and the pointer passed to it should not be volatile."
+--- gstreamermm-1.10.0/gstreamer/gstreamermm/register.h.orig	2017-10-20 12:26:46.000000000 +0300
++++ gstreamermm-1.10.0/gstreamer/gstreamermm/register.h	2021-05-25 17:52:13.031337753 +0300
+@@ -110,7 +110,7 @@
+     /* The typedef for GType may be gulong or gsize, depending on the
+      * system and whether the compiler is c++ or not. The g_once_init_*
+      * functions always take a gsize * though ... */
+-    static volatile gsize gonce_data = 0;
++    static gsize gonce_data = 0;
+     if (g_once_init_enter (&gonce_data)) {
+         GTypeInfo info;
+ 
diff --git a/srcpkgs/gstreamermm/template b/srcpkgs/gstreamermm/template
index 863e982f34e..1e832c3298f 100644
--- a/srcpkgs/gstreamermm/template
+++ b/srcpkgs/gstreamermm/template
@@ -1,24 +1,18 @@
 # Template file for 'gstreamermm'
 pkgname=gstreamermm
 version=1.10.0
-revision=2
+revision=3
 build_style=gnu-configure
+configure_args="--disable-plugins-bad"
 hostmakedepends="pkg-config perl"
 makedepends="gst-plugins-base1-devel pangomm-devel"
-configure_args="--disable-plugins-bad"
 short_desc="GStreamer API C++ bindings"
 maintainer="newbluemoon <blaumolch@mailbox.org>"
+license="GPL-2.0-only, LGPL-2.1-or-later"
 homepage="https://gstreamer.freedesktop.org/bindings/cplusplus.html"
-license="GPL-2, GPL-2.1"
-distfiles="${GNOME_SITE}/${pkgname}/${version%.*}/${pkgname}-${version}.tar.xz"
+distfiles="${GNOME_SITE}/gstreamermm/${version%.*}/gstreamermm-${version}.tar.xz"
 checksum=be58fe9ef7d7e392568ec85e80a84f4730adbf91fb0355ff7d7c616675ea8d60
 
-post_install() {
-	vlicense COPYING
-	vlicense COPYING.examples
-	vlicense COPYING.tools
-}
-
 gstreamermm-devel_package() {
 	depends="${makedepends} ${sourcepkg}>=${version}_${revision}"
 	short_desc+=" - development files"
@@ -30,4 +24,3 @@ gstreamermm-devel_package() {
 		vmove usr/share
 	}
 }
-