diff --git a/api/command.py b/api/command.py
index 7c3dc27..71bcd4a 100644
--- a/api/command.py
+++ b/api/command.py
@@ -38,7 +38,7 @@ _s7_valve = 'valve'
 _s8_tag = 'tag'
 _s9_demand = 'demand'
 _s10_status = 'status'
-_s11_pattern = 'patten'
+_s11_pattern = 'pattern'
 _s12_curve = 'curve'
 _s13_control = 'control'
 _s14_rule = 'rule'