diff --git a/src/toolsComm/antelope/Makefile b/src/toolsComm/antelope/Makefile
index a27bafa5f..e0b8f3807 100644
--- a/src/toolsComm/antelope/Makefile
+++ b/src/toolsComm/antelope/Makefile
@@ -11,6 +11,8 @@ SRCS=	closure.c error.c lalr.c lr0.c main.c \
 	mkpar.c output.c reader.c skeleton.c \
 	symtab.c verbose.c warshall.c
 
-PROD=antelope
+PROD_DEFAULT=antelope
+PROD_vxWorks= -nil-
 
 include $(TOP)/configure/RULES_BUILD
+
diff --git a/src/toolsComm/flex/Makefile b/src/toolsComm/flex/Makefile
index 6e0bbedb4..c20f0c11c 100644
--- a/src/toolsComm/flex/Makefile
+++ b/src/toolsComm/flex/Makefile
@@ -11,7 +11,7 @@ YACCOPT = -l -d
 SKELETON_FILE=include/flex.skel.static
 
 #	ARCH_CLASS hp700 needs special flags,
-#	everything else uses default:
+#	everything else uses DEFAULT:
 #
 USR_CFLAGS_DEFAULT := -DUSG
 USR_CFLAGS_hp700 := -DSCO_UNIX
@@ -26,7 +26,8 @@ INC += flex.skel.static
 #
 SRCS := ccl.c dfa.c ecs.c gen.c misc.c nfa.c sym.c tblcmp.c parse.c
 
-PROD := e_flex
+PROD_DEFAULT := e_flex
+PROD_vxWorks := -nil-
 
 include $(TOP)/configure/RULES_BUILD