diff --git a/lib/haproxyctl/environment.rb b/lib/haproxyctl/environment.rb
index aee53fd..0898298 100644
--- a/lib/haproxyctl/environment.rb
+++ b/lib/haproxyctl/environment.rb
@@ -39,7 +39,11 @@ def exec
     def nbproc 
       @nbproc ||= begin
         config.match /nbproc \s*(\d*)\s*/
-        Regexp.last_match[1].to_i || 1
+	@x = 1
+	if (Regexp.last_match)
+          @x = Regexp.last_match[1].to_i
+	end
+	(@x)
       end
     end