--- a/src/misc1/fiolib/Makefile
+++ b/src/misc1/fiolib/Makefile
@@ -18,6 +18,11 @@
 object: $(LIBOBJS)
 
 library: archive ranlib
+fcpack.f:fcpack.g
+	@echo "Substituting system constants (fcpack.g -> fcpack.f)"
+	@sed -e "s!@ICLCT!$(ISLCT)!" \
+	  fcpack.g > fcpack.f
+
 
 fcpack.f:fcpack.g
 	@echo "Substituting system constants (fcpack.g -> fcpack.f)"
