diff --git a/src/pathdef.sh b/src/pathdef.sh
new file mode 100755
index 0000000..b2a83a0
--- /dev/null
+++ b/src/pathdef.sh
@@ -0,0 +1,11 @@
+#! /bin/sh
+#
+# pathdef.sh: adjust pathdef.c for auto/link.sed, if it exists
+#
+if test -s auto/link.sed; then
+  cp auto/pathdef.c auto/pathdef.tmp
+  sed -f auto/link.sed <auto/pathdef.tmp >auto/pathdef.c
+  rm -f auto/pathdef.tmp
+fi
+
+# vim:set sw=2 et: