diff --git a/pkg/icingadb/v1/command.go b/pkg/icingadb/v1/command.go
index 7080e95a..cd4db2a7 100644
--- a/pkg/icingadb/v1/command.go
+++ b/pkg/icingadb/v1/command.go
@@ -25,6 +25,7 @@ type CommandArgument struct {
 	RepeatKey           types.Bool   `json:"repeat_key"`
 	Required            types.Bool   `json:"required"`
 	SetIf               types.String `json:"set_if"`
+	Separator           types.String `json:"separator"`
 	SkipKey             types.Bool   `json:"skip_key"`
 }
 
diff --git a/schema/mysql/schema.sql b/schema/mysql/schema.sql
index 645b1c0f..a5ed7acd 100644
--- a/schema/mysql/schema.sql
+++ b/schema/mysql/schema.sql
@@ -411,6 +411,7 @@ CREATE TABLE checkcommand_argument (
   repeat_key enum('n', 'y') NOT NULL,
   required enum('n', 'y') NOT NULL,
   set_if varchar(255) DEFAULT NULL,
+  `separator` varchar(255) DEFAULT NULL,
   skip_key enum('n', 'y') NOT NULL,
 
   PRIMARY KEY (id)
@@ -474,6 +475,7 @@ CREATE TABLE eventcommand_argument (
   repeat_key enum('n', 'y') NOT NULL,
   required enum('n', 'y') NOT NULL,
   set_if varchar(255) DEFAULT NULL,
+  `separator` varchar(255) DEFAULT NULL,
   skip_key enum('n', 'y') NOT NULL,
 
   PRIMARY KEY (id)
@@ -535,6 +537,7 @@ CREATE TABLE notificationcommand_argument (
   repeat_key enum('n', 'y') NOT NULL,
   required enum('n', 'y') NOT NULL,
   set_if varchar(255) DEFAULT NULL,
+  `separator` varchar(255) DEFAULT NULL,
   skip_key enum('n', 'y') NOT NULL,
 
   PRIMARY KEY (id)
diff --git a/schema/mysql/upgrades/1.0.0.sql b/schema/mysql/upgrades/1.0.0.sql
index 4286ac9d..61a24e2e 100644
--- a/schema/mysql/upgrades/1.0.0.sql
+++ b/schema/mysql/upgrades/1.0.0.sql
@@ -11,6 +11,15 @@ ALTER TABLE host_state
 ALTER TABLE service_state
   ADD COLUMN previous_soft_state tinyint unsigned NOT NULL AFTER hard_state;
 
+ALTER TABLE checkcommand_argument
+  ADD COLUMN `separator` varchar(255) DEFAULT NULL AFTER set_if;
+
+ALTER TABLE eventcommand_argument
+  ADD COLUMN `separator` varchar(255) DEFAULT NULL AFTER set_if;
+
+ALTER TABLE notificationcommand_argument
+  ADD COLUMN `separator` varchar(255) DEFAULT NULL AFTER set_if;
+
 ALTER TABLE acknowledgement_history
   ADD index idx_acknowledgement_history_clear_time (clear_time) COMMENT 'Filter for history retention';
 
diff --git a/schema/pgsql/schema.sql b/schema/pgsql/schema.sql
index afce6f62..6caa77b3 100644
--- a/schema/pgsql/schema.sql
+++ b/schema/pgsql/schema.sql
@@ -670,6 +670,7 @@ CREATE TABLE checkcommand_argument (
   repeat_key boolenum NOT NULL DEFAULT 'n',
   required boolenum NOT NULL DEFAULT 'n',
   set_if varchar(255) DEFAULT NULL,
+  separator varchar(255) DEFAULT NULL,
   skip_key boolenum NOT NULL DEFAULT 'n',
 
   CONSTRAINT pk_checkcommand_argument PRIMARY KEY (id)
@@ -775,6 +776,7 @@ CREATE TABLE eventcommand_argument (
   repeat_key boolenum NOT NULL DEFAULT 'n',
   required boolenum NOT NULL DEFAULT 'n',
   set_if varchar(255) DEFAULT NULL,
+  separator varchar(255) DEFAULT NULL,
   skip_key boolenum NOT NULL DEFAULT 'n',
 
   CONSTRAINT pk_eventcommand_argument PRIMARY KEY (id)
@@ -878,6 +880,7 @@ CREATE TABLE notificationcommand_argument (
   repeat_key boolenum NOT NULL DEFAULT 'n',
   required boolenum NOT NULL DEFAULT 'n',
   set_if varchar(255) DEFAULT NULL,
+  separator varchar(255) DEFAULT NULL,
   skip_key boolenum NOT NULL DEFAULT 'n',
 
   CONSTRAINT pk_notificationcommand_argument PRIMARY KEY (id)