diff --git a/pdc-bulk-reset-password.sh b/pdc-bulk-reset-password.sh
index a65c09a..8219ae7 100755
--- a/pdc-bulk-reset-password.sh
+++ b/pdc-bulk-reset-password.sh
@@ -33,6 +33,12 @@ while IFS="" read -r p || [ -n "$p" ]; do
     continue
   fi
 
+  # Check if $USERNAME starts with a number
+  if [[ $USERNAME =~ ^[0-9] ]]; then
+    echo "Username cannot start with a number. Appending 'u' to the beginning of the username..."
+    USERNAME="u$USERNAME"
+  fi
+
   # Check if user exists
   if ! samba-tool user show $USERNAME >/dev/null 2>&1; then
     echo "User $USERNAME do not exists"