diff --git a/modules.d/90mdraid/module-setup.sh b/modules.d/90mdraid/module-setup.sh
index ac745d1c..81c94f2d 100755
--- a/modules.d/90mdraid/module-setup.sh
+++ b/modules.d/90mdraid/module-setup.sh
@@ -54,6 +54,8 @@ cmdline() {
             done
         )
 
+        [[ -z "$UUID" ]] && continue
+
         if ! [[ ${_activated[${UUID}]} ]]; then
             printf "%s" " rd.md.uuid=${UUID}"
             _activated["${UUID}"]=1