diff --git a/Makefile.in b/Makefile.in
index dc38bb3f0c..a452b666d4 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -319,7 +319,7 @@ volser: cmd comerr usd kauth vlserver audit
 
 tvolser: project tviced usd libafsrpc libafsauthent volser
 	+@case ${SYS_NAME} in						\
-	*_darwin_*|alpha_dux*|sgi_*|sun*_5*|rs_aix*|*linux*|hp_ux11*|ia64_hpux*|*[no]bsd*)   \
+	*_darwin_*|alpha_dux*|sgi_*|sun*_5*|rs_aix*|*linux*|hp_ux11*|ia64_hpux*|*[nof]bsd*)   \
 		${COMPILE_PART1} tvolser ${COMPILE_PART2} &&            \
 		if [ "xyes" = "x$(ENABLE_PTHREADED_UNIK)" ] ; then	\
 			$(MAKE) $(COMPILE_PART2B)_vos;  					\
@@ -330,7 +330,7 @@ tvolser: project tviced usd libafsrpc libafsauthent volser
 
 dvolser: project tviced usd libafsrpc libafsauthent volser
 	+@case ${SYS_NAME} in						\
-	*_darwin_*|alpha_dux*|sgi_*|sun*_5*|rs_aix*|*linux*|hp_ux11*|ia64_hpux*|*[no]bsd*)   \
+	*_darwin_*|alpha_dux*|sgi_*|sun*_5*|rs_aix*|*linux*|hp_ux11*|ia64_hpux*|*[nof]bsd*)   \
 		${COMPILE_PART1} dvolser ${COMPILE_PART2} ;;            \
 	*)                                                              \
 		echo Not building DAFS volser for ${SYS_NAME} ;;          \