diff --git a/uwsgiconfig.py b/uwsgiconfig.py
index 7cf455ea..58c9be8c 100644
--- a/uwsgiconfig.py
+++ b/uwsgiconfig.py
@@ -263,6 +263,9 @@ def build_uwsgi(uc, print_only=False, gcll=None):
         print(' '.join(cflags))
         sys.exit(0)
 
+    if 'APPEND_CFLAGS' in os.environ:
+        cflags += os.environ['APPEND_CFLAGS'].split()
+
     print("detected CPU cores: %d" % CPUCOUNT)
     print("configured CFLAGS: %s" % ' '.join(cflags))