diff --git a/ruby/vim.rb b/ruby/vim.rb
index c2464b78..8c855e76 100644
--- a/ruby/vim.rb
+++ b/ruby/vim.rb
@@ -26,11 +26,11 @@
 
 module VIM
   def self.has_syntax?
-    VIM::evaluate('has("syntax")').to_i != 0
+    ::VIM::evaluate('has("syntax")').to_i != 0
   end
 
   def self.pwd
-    VIM::evaluate 'getcwd()'
+    ::VIM::evaluate 'getcwd()'
   end
 
   # Escape a string for safe inclusion in a Vim single-quoted string