diff --git a/controllers/heatapi_controller.go b/controllers/heatapi_controller.go
index 6d9de11c..13ad29ea 100644
--- a/controllers/heatapi_controller.go
+++ b/controllers/heatapi_controller.go
@@ -882,6 +882,7 @@ func (r *HeatAPIReconciler) generateServiceSecrets(
 	}
 	customData[heat.DefaultsConfigFileName] = string(heatSecret.Data[heat.DefaultsConfigFileName])
 	customData[heat.CustomConfigFileName] = string(heatSecret.Data[heat.CustomConfigFileName])
+	customData[heat.CustomConfigSecretsFileName] = string(heatSecret.Data[heat.CustomConfigSecretsFileName])
 
 	customSecrets := ""
 	for _, secretName := range instance.Spec.CustomServiceConfigSecrets {
diff --git a/controllers/heatcfnapi_controller.go b/controllers/heatcfnapi_controller.go
index 4d826d08..fd4e634a 100644
--- a/controllers/heatcfnapi_controller.go
+++ b/controllers/heatcfnapi_controller.go
@@ -879,6 +879,7 @@ func (r *HeatCfnAPIReconciler) generateServiceSecrets(
 	}
 	customData[heat.DefaultsConfigFileName] = string(heatSecret.Data[heat.DefaultsConfigFileName])
 	customData[heat.CustomConfigFileName] = string(heatSecret.Data[heat.CustomConfigFileName])
+	customData[heat.CustomConfigSecretsFileName] = string(heatSecret.Data[heat.CustomConfigSecretsFileName])
 
 	customSecrets := ""
 	for _, secretName := range instance.Spec.CustomServiceConfigSecrets {
diff --git a/controllers/heatengine_controller.go b/controllers/heatengine_controller.go
index 164dcf82..4e482617 100644
--- a/controllers/heatengine_controller.go
+++ b/controllers/heatengine_controller.go
@@ -591,6 +591,7 @@ func (r *HeatEngineReconciler) generateServiceSecrets(
 	}
 	customData[heat.DefaultsConfigFileName] = string(heatSecret.Data[heat.DefaultsConfigFileName])
 	customData[heat.CustomConfigFileName] = string(heatSecret.Data[heat.CustomConfigFileName])
+	customData[heat.CustomConfigSecretsFileName] = string(heatSecret.Data[heat.CustomConfigSecretsFileName])
 
 	customSecrets := ""
 	for _, secretName := range instance.Spec.CustomServiceConfigSecrets {