1 files changed, 2 insertions, 1 deletions
diff --git a/acprep b/acprep
index b7c5e177..5959e99a 100755
--- a/acprep
+++ b/acprep
@@ -1146,7 +1146,8 @@ class PrepareBuild(CommandLineApp):
                 pass
 
     def setup_flavor_default(self):
-        pass
+        if self.darwin_gcc:
+            self.option_no_pch()
 
     def setup_flavor_debug(self):
         self.configure_args.append('--enable-debug')