diff --git a/wscript b/wscript
index 8a4912d47b..e6e588c6af 100644
--- a/wscript
+++ b/wscript
@@ -162,7 +162,7 @@ def set_compiler_flags (conf,opt):
     else:
         conf.env['build_target'] = opt.dist_target
 
-    if conf.env['build_target'] = 'snowleopard':
+    if conf.env['build_target'] == 'snowleopard':
         #
         # stupid OS X 10.6 has a bug in math.h that prevents llrint and friends
         # from being visible.