diff --git a/configure-ng.py b/configure-ng.py
index f60ae58..86db0a6 100644
--- a/configure-ng.py
+++ b/configure-ng.py
@@ -2217,7 +2217,7 @@ def generate_sip_module_code(target_config, verbose, no_timestamp, parts, tracin
     mk_clean_dir(mname)
 
     # Build the SIP command line.
-    argv = [quote(target_config.sip), '-w', '-f', sip_flags]
+    argv = [quote(target_config.sip), '-w', sip_flags]
 
     # Make sure any unknown Qt version gets treated as the latest Qt v4.
     argv.append('-B')

Add patch for building PyQt4 with newer sip
Add patch for building PyQt4 with newer sip

sip is starting to produce warnings about PyQt4 that configure
was treating as errors. No choice but to accept the warnings
