diff --git a/src/as/Makefile b/src/as/Makefile
index b30090267..b37576a73 100644
--- a/src/as/Makefile
+++ b/src/as/Makefile
@@ -37,3 +37,5 @@ $(INSTALL_INC)/asLib.h:../asLib.h
 clean::
 	@$(RM) asLib.c asLib_lex.c 
 
+$(INSTALL_INC)/asLib.h:../asLib.h
+