1 files changed, 1 insertions, 1 deletions
diff --git a/autowaf.py b/autowaf.py
index 65255af..78bd7fc 100644
--- a/autowaf.py
+++ b/autowaf.py
@@ -87,7 +87,7 @@ def set_options(opt):
                        help="LV2 bundles [Default: LIBDIR/lv2]")
     g_step = 1
 
-def check_header(conf, name, define='', mandatory=False):
+def check_header(conf, name, define='', mandatory=True):
     "Check for a header"
     includes = '' # search default system include paths
     if sys.platform == "darwin":