diff --git a/lib/index.js b/lib/index.js
index 9b92e1f..7b09e80 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -120,6 +120,11 @@ function stash(cmdFile, dest) {
     log('nothing to stash')
     return
   }
+  dest = dest.trim()
+  if (!dest) {
+    log('try: .stash /path/to/file')
+    return
+  }
   var read = fs.createReadStream(cmdFile)
   read.on('end', function() {
     log('stashed')
@@ -130,6 +135,11 @@ function stash(cmdFile, dest) {
 }
 
 function unstash(cmdFile, source) {
+  source = source.trim()
+  if (!source) {
+    log('try: .unstash /path/to/file')
+    return
+  }
   try {
     fs.statSync(source)
   } catch (e) {