diff --git a/c_gen/templates/of_message.h b/c_gen/templates/of_message.h
index c1b6785..befda2f 100644
--- a/c_gen/templates/of_message.h
+++ b/c_gen/templates/of_message.h
@@ -48,11 +48,13 @@
 #define OF_MESSAGE_ERROR_TYPE_OFFSET 8
 #define OF_MESSAGE_STATS_TYPE_OFFSET 8
 #define OF_MESSAGE_FLOW_MOD_COMMAND_OFFSET(version) ((version) == 1 ? 56 : 25)
+#define OF_MESSAGE_GROUP_MOD_COMMAND_OFFSET 8
 
 #define OF_MESSAGE_MIN_LENGTH 8
 #define OF_MESSAGE_MIN_STATS_LENGTH (OF_MESSAGE_STATS_TYPE_OFFSET + 2)
 #define OF_MESSAGE_MIN_ERROR_LENGTH (OF_MESSAGE_ERROR_TYPE_OFFSET + 4)
 #define OF_MESSAGE_MIN_FLOW_MOD_LENGTH(version)  ((version) == 1 ? 57 : 26)
+#define OF_MESSAGE_MIN_GROUP_MOD_LENGTH (OF_MESSAGE_GROUP_MOD_COMMAND_OFFSET + 2)
 
 #define OF_MESSAGE_EXPERIMENTER_ID_OFFSET 8
 #define OF_MESSAGE_EXPERIMENTER_SUBTYPE_OFFSET 12
@@ -312,4 +314,23 @@
     buf_u32_set(msg + OF_MESSAGE_STATS_EXPERIMENTER_SUBTYPE_OFFSET, subtype);
 }
 
+/**
+ * @brief Get/set group mod command of a message
+ * @param msg Pointer to the message buffer of sufficient length
+ * @param subtype Data for set operation
+ * @returns get returns command in host order
+ */
+
+static inline uint16_t
+of_message_group_mod_command_get(of_message_t msg) {
+    uint16_t val;
+    buf_u16_get(msg + OF_MESSAGE_GROUP_MOD_COMMAND_OFFSET, &val);
+    return val;
+}
+
+static inline void
+of_message_group_mod_command_set(of_message_t msg, uint16_t command) {
+    buf_u16_set(msg + OF_MESSAGE_GROUP_MOD_COMMAND_OFFSET, command);
+}
+
 #endif /* _OF_MESSAGE_H_ */