--- src/hb.hh
+++ src/hb.hh
@@ -115,6 +115,7 @@
 #pragma GCC diagnostic warning "-Wunsafe-loop-optimizations"
 #pragma GCC diagnostic warning "-Wunused-but-set-variable"
 #ifdef __clang__
+#pragma clang diagnostic warning "-Wunused-template"
 // The following are too buggy on gcc
 // https://github.com/harfbuzz/harfbuzz/issues/5589
 // https://github.com/harfbuzz/harfbuzz/pull/5367