diff --git a/lib/vagrant/devcommands/runner/chain.rb b/lib/vagrant/devcommands/runner/chain.rb
index b26f8cd..1a69987 100644
--- a/lib/vagrant/devcommands/runner/chain.rb
+++ b/lib/vagrant/devcommands/runner/chain.rb
@@ -31,7 +31,11 @@ def run(chain)
         def argv_for(command_def)
           return @argv unless command_def.key?(:argv)
 
-          @argv + command_def[:argv].split
+          if command_def[:argv].is_a?(String)
+            @argv + command_def[:argv].split
+          else
+            @argv + command_def[:argv]
+          end
         end
 
         def runnable_for(command_def)