diff --git a/CHANGELOG.md b/CHANGELOG.md
index d6adaa7c0..39a5fcee1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,8 @@ IMPROVEMENTS:
 
 BUG FIXES:
 
+  - VBoxManage or any other executable missing from PATH properly
+    reported. Regression from 1.2.2. [GH-1928]
   - Boxes downloaded as part of `vagrant up` are now done so _prior_ to
     config validation. This allows Vagrantfiles to references files that
     may be in the box itself. [GH-1061]
diff --git a/lib/vagrant/util/subprocess.rb b/lib/vagrant/util/subprocess.rb
index af4646bc9..bf34556dd 100644
--- a/lib/vagrant/util/subprocess.rb
+++ b/lib/vagrant/util/subprocess.rb
@@ -25,13 +25,12 @@ module Vagrant
       end
 
       def initialize(*command)
-        progname = command[0]
         @options = command.last.is_a?(Hash) ? command.pop : {}
-        @command = command
+        @command = command.dup
         @command[0] = Which.which(@command[0]) if !File.file?(@command[0])
         if !@command[0]
-          raise Errors::CommandUnavailableWindows, file: progname if Platform.windows?
-          raise Errors::CommandUnavailable, file: progname
+          raise Errors::CommandUnavailableWindows, file: command[0] if Platform.windows?
+          raise Errors::CommandUnavailable, file: command[0]
         end
 
         @logger  = Log4r::Logger.new("vagrant::util::subprocess")