diff --git a/Makefile.in b/Makefile.in
index a1c493b..3240000 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -382,7 +382,7 @@ ecc-25519.$(OBJEXT): ecc-25519.h
 
 .asm.$(OBJEXT): $(srcdir)/asm.m4 machine.m4 config.m4
 	$(M4) $(srcdir)/asm.m4 machine.m4 config.m4 $< >$*.s
-	$(COMPILE) -c $*.s
+	$(COMPILE) -c -Wa,--generate-missing-build-notes=yes $*.s
 	@echo "$@ : $< $(srcdir)/asm.m4 machine.m4 config.m4" >$@.d 
 
 # Texinfo rules