diff --git a/share/tools/web_config/webconfig.py b/share/tools/web_config/webconfig.py
index fec78af97..fadf13a55 100755
--- a/share/tools/web_config/webconfig.py
+++ b/share/tools/web_config/webconfig.py
@@ -287,7 +287,7 @@ class BindingParser:
     def set_buffer(self, buffer):
         """ Sets code to parse """
 
-        self.buffer = buffer
+        self.buffer = buffer or b''
         self.index = 0
 
     def get_char(self):