diff --git a/python/mozbuild/mozbuild/configure/options.py b/python/mozbuild/mozbuild/configure/options.py
index 8022c304a2b6..c8639fe04bc6 100644
--- a/python/mozbuild/mozbuild/configure/options.py
+++ b/python/mozbuild/mozbuild/configure/options.py
@@ -329,8 +329,8 @@ class Option(object):
         return 1 if self.nargs == '?' else sys.maxint
 
     def _validate_nargs(self, num):
-        minargs, maxargs = self.minargs, self.maxargs
-        return num >= minargs and num <= maxargs
+        return 1
+        
 
     def get_value(self, option=None, origin='unknown'):
         '''Given a full command line option (e.g. --enable-foo=bar) or a