diff --git a/refpolicy/support/Makefile.devel b/refpolicy/support/Makefile.devel
index 018de12..a059f87 100644
--- a/refpolicy/support/Makefile.devel
+++ b/refpolicy/support/Makefile.devel
@@ -1,4 +1,5 @@
 
+HEADERDIR ?= /usr/share/selinux/refpolicy
 include $(HEADERDIR)/build.conf
 
 # executables