diff --git a/lib/hx509/Makefile.am b/lib/hx509/Makefile.am
index dcaee7744..344860db2 100644
--- a/lib/hx509/Makefile.am
+++ b/lib/hx509/Makefile.am
@@ -128,7 +128,7 @@ crmf_asn1_files: $(asn1_compile) $(srcdir)/crmf.asn1
 $(libhx509_la_OBJECTS): $(srcdir)/hx509-protos.h $(srcdir)/hx509-private.h $(srcdir)/hx_locl.h
 
 $(srcdir)/hx509-protos.h:
-	cd $(srcdir) && perl ../../cf/make-proto.pl -R '^(_|^C)' -E HX509_LIB_FUNCTION -q -P comment -o hx509-protos.h $(dist_libhx509_la_SOURCES) || rm -f hx509-protos.h
+	cd $(srcdir) && perl ../../cf/make-proto.pl -R '^(_|^C)' -E HX509_LIB -q -P comment -o hx509-protos.h $(dist_libhx509_la_SOURCES) || rm -f hx509-protos.h
 
 $(srcdir)/hx509-private.h:
 	cd $(srcdir) && perl ../../cf/make-proto.pl -q -P comment -p hx509-private.h $(dist_libhx509_la_SOURCES) || rm -f hx509-private.h