diff --git a/src/hb.hh b/src/hb.hh
index f39061dea..a2cbba934 100644
--- a/src/hb.hh
+++ b/src/hb.hh
@@ -79,6 +79,7 @@
 #pragma GCC diagnostic warning "-Wformat=2"
 #pragma GCC diagnostic warning "-Wignored-pragma-optimize"
 #pragma GCC diagnostic warning "-Wlogical-op"
+#pragma GCC diagnostic warning "-Wmaybe-uninitialized"
 #pragma GCC diagnostic warning "-Wmissing-format-attribute"
 #pragma GCC diagnostic warning "-Wsign-compare"
 #pragma GCC diagnostic warning "-Wundef"