diff --git a/sdk_container/src/third_party/portage-stable/eclass/vim-plugin.eclass b/sdk_container/src/third_party/portage-stable/eclass/vim-plugin.eclass
index 81e1e54f63..ee4f1b6e0f 100644
--- a/sdk_container/src/third_party/portage-stable/eclass/vim-plugin.eclass
+++ b/sdk_container/src/third_party/portage-stable/eclass/vim-plugin.eclass
@@ -27,7 +27,7 @@ inherit vim-doc
 # @ECLASS_VARIABLE: VIM_PLUGIN_VIM_VERSION
 # @DESCRIPTION:
 # Minimum Vim version the plugin supports.
-: ${VIM_PLUGIN_VIM_VERSION:=7.3}
+: "${VIM_PLUGIN_VIM_VERSION:=7.3}"
 
 DEPEND="|| ( >=app-editors/vim-${VIM_PLUGIN_VIM_VERSION}
 	>=app-editors/gvim-${VIM_PLUGIN_VIM_VERSION} )"