diff --git a/appl/otp/Makefile.am b/appl/otp/Makefile.am
index 11e10d655..84a48f35d 100644
--- a/appl/otp/Makefile.am
+++ b/appl/otp/Makefile.am
@@ -16,5 +16,5 @@ LDADD = \
 
 ## XXX how should this be done?
 install-exec-hook:
-	@if chown 0:0 $(bindir)/otp && chmod u+s $(bindir)/otp; then :;else \
-	chmod 0 /usr/heimdal/bin/otp; fi
+	@if chown 0:0 $(DESTDIR)$(bindir)/otp && chmod u+s $(DESTDIR)$(bindir)/otp; then :;else \
+	chmod 0 $(DESTDIR)$(bindir)/otp; fi