diff --git a/rmdir-empty b/rmdir-empty
index 9a9ad64..774fff5 100755
--- a/rmdir-empty
+++ b/rmdir-empty
@@ -1,5 +1,15 @@
 #!/bin/sh
 # recursively delete empty directories
-find . -depth \
-  -path "." -prune -or \
-  -type d -empty -exec rmdir -v {} \;
+
+rmdir_empty() {
+  # make default . explicit
+  if [ -z "$1" ]; then
+    set -- .
+  fi
+
+  find "$@" -depth \
+    -path "." -prune -or \
+    -type d -empty -exec rmdir -v {} \;
+}
+
+rmdir_empty "$@"