diff --git a/antigen.zsh b/antigen.zsh
index 3296a3d..9d3152c 100644
--- a/antigen.zsh
+++ b/antigen.zsh
@@ -98,7 +98,7 @@ antigen-bundles () {
 
     local line
 
-    grep -v '^\s*$\|^#' | while read line; do
+    grep '^[[:space:]]*[^[:space:]#]' | while read line; do
         # Using `eval` so that we can use the shell-style quoting in each line
         # piped to `antigen-bundles`.
         eval "antigen-bundle $line"