diff --git a/internal/exec/utils.go b/internal/exec/utils.go
index 0a4b662c2b..c6200682b7 100644
--- a/internal/exec/utils.go
+++ b/internal/exec/utils.go
@@ -35,6 +35,7 @@ var (
 		cfg.DeployRunInitFlag,
 		cfg.InitRunReconfigure,
 		cfg.AutoGenerateBackendFileFlag,
+		cfg.AppendUserAgentFlag,
 		cfg.FromPlanFlag,
 		cfg.PlanFileFlag,
 		cfg.HelpFlag1,
@@ -668,6 +669,21 @@ func processArgsAndFlags(componentType string, inputArgsAndFlags []string) (sche
 			info.TerraformDir = terraformDirFlagParts[1]
 		}
 
+		if arg == cfg.AppendUserAgentFlag {
+			if len(inputArgsAndFlags) <= (i + 1) {
+				return info, fmt.Errorf("invalid flag: %s requires a value", arg)
+			}
+			info.AppendUserAgent = inputArgsAndFlags[i+1]
+			indexesToRemove = append(indexesToRemove, i, i+1)
+		} else if strings.HasPrefix(arg+"=", cfg.AppendUserAgentFlag) {
+			parts := strings.SplitN(arg, "=", 2)
+			if len(parts) != 2 {
+				return info, fmt.Errorf("invalid flag: %s", arg)
+			}
+			info.AppendUserAgent = parts[1]
+			indexesToRemove = append(indexesToRemove, i)
+		}
+
 		if arg == cfg.HelmfileCommandFlag {
 			if len(inputArgsAndFlags) <= (i + 1) {
 				return info, fmt.Errorf("invalid flag: %s", arg)
diff --git a/pkg/config/const.go b/pkg/config/const.go
index 720f535075..924d97249c 100644
--- a/pkg/config/const.go
+++ b/pkg/config/const.go
@@ -27,6 +27,7 @@ const (
 
 	DeployRunInitFlag           = "--deploy-run-init"
 	AutoGenerateBackendFileFlag = "--auto-generate-backend-file"
+	AppendUserAgentFlag         = "--append-user-agent"
 	InitRunReconfigure          = "--init-run-reconfigure"
 
 	FromPlanFlag       = "--from-plan"
diff --git a/pkg/schema/schema.go b/pkg/schema/schema.go
index 8c4a6dcbfd..89e90b0618 100644
--- a/pkg/schema/schema.go
+++ b/pkg/schema/schema.go
@@ -133,6 +133,7 @@ type ArgsAndFlagsInfo struct {
 	DeployRunInit             string
 	InitRunReconfigure        string
 	AutoGenerateBackendFile   string
+	AppendUserAgent           string
 	UseTerraformPlan          bool
 	PlanFile                  string
 	DryRun                    bool