diff --git a/galion_modbus/poll.py b/galion_modbus/poll.py
index 8a33957..aa4371c 100644
--- a/galion_modbus/poll.py
+++ b/galion_modbus/poll.py
@@ -40,3 +40,4 @@ def write_coil(host, port=502, unit=1, address=0, value=True):
         return not rr.isError()
     finally:
         c.close()
+# increase timeout for slow RTUs