diff --git a/bin/antigen.zsh b/bin/antigen.zsh
index cbac5679..66179059 100644
--- a/bin/antigen.zsh
+++ b/bin/antigen.zsh
@@ -1715,7 +1715,7 @@ antigen-ext-init () {
 
     builtin local bundle &> /dev/null
     for bundle in ${_PARALLEL_BUNDLE[@]}; do
-      antigen-bundle $bundle
+      antigen-bundle ${=bundle}
     done
     
 
diff --git a/src/ext/parallel.zsh b/src/ext/parallel.zsh
index 9a045499..9dc8d1f4 100644
--- a/src/ext/parallel.zsh
+++ b/src/ext/parallel.zsh
@@ -51,7 +51,7 @@
 
     builtin local bundle &> /dev/null
     for bundle in ${_PARALLEL_BUNDLE[@]}; do
-      antigen-bundle $bundle
+      antigen-bundle ${=bundle}
     done
     
 
diff --git a/tests/bundles.t b/tests/bundles.t
index 03d3fa4e..8814dc84 100644
--- a/tests/bundles.t
+++ b/tests/bundles.t
@@ -36,3 +36,7 @@ Again, check if they are both applied.
   hehe
   $ hehe2
   hehe2
+
+Add bundle theme (contains spaces).
+
+  $ echo "$PLUGIN_DIR silly --btype=theme" | antigen-bundles &> /dev/null