diff --git a/prims.sh b/prims.sh
index bff7bc8..d478abb 100644
--- a/prims.sh
+++ b/prims.sh
@@ -1,14 +1,14 @@
 #
 #   module  : prims.sh
-#   version : 1.3
-#   date    : 04/11/22
+#   version : 1.4
+#   date    : 10/26/23
 #
 #   Generate builtin.c and builtin.h
 #   The directory needs to be given as parameter.
 #
 echo checking builtin.c and builtin.h
 todo=0
-ls -1Q $1/src/*.c | sed 's/^/#include /' >prims.tmp
+ls $1/src/*.c | sed 's/^/#include "/;s/$/"/' >prims.tmp
 if [ ! -f $1/builtin.c -o ! -f $1/builtin.h ]
 then
   echo creating builtin.c and builtin.h