diff --git a/tools/glib.supp b/tools/glib.supp
index 6820e41c9..5c3740574 100644
--- a/tools/glib.supp
+++ b/tools/glib.supp
@@ -1322,3 +1322,13 @@
 	fun:g_rw_lock_writer_lock
 	fun:g_log_writer_default_set_debug_domains
 }
+
+# This can be removed when versions of valgrind including the fix are widely used.
+# See https://gitlab.gnome.org/GNOME/glib/-/issues/3292
+{
+   g_utf8_collate_key wcsxfrm false-positive
+   Memcheck:Addr32
+   ...
+   fun:wcsxfrm*
+   fun:g_utf8_collate_key
+}