diff --git a/whatsdirty b/whatsdirty
index cb7c0a6..fd9f8f3 100755
--- a/whatsdirty
+++ b/whatsdirty
@@ -261,8 +261,13 @@ main() {
 # === Autocomplete Function ===
 
 handle_autocomplete() {
+    # Ensure COMP_WORDS and COMP_CWORD are set
+    if [ -z "${COMP_WORDS+x}" ] || [ -z "${COMP_CWORD+x}" ]; then
+        return 0
+    fi
+
     local cur_word="${COMP_WORDS[COMP_CWORD]}"
-    
+
     # If we're completing the first argument after 'whatsdirty'
     if [ ${COMP_CWORD} -eq 1 ]; then
         # Suggest common directories and saved directory