diff --git a/infra/api/service/main.tf b/infra/api/service/main.tf
index 3913a8627..7fdbddc3e 100644
--- a/infra/api/service/main.tf
+++ b/infra/api/service/main.tf
@@ -148,8 +148,8 @@ module "service" {
     local.service_config.extra_environment_variables,
     { "ENVIRONMENT" : var.environment_name },
     { "DEPLOY_TIMESTAMP" : timestamp() },
-    deploy_github_sha != null ? { "DEPLOY_GITHUB_SHA" : var.deploy_github_sha } : {},
-    deploy_github_ref != null ? { "DEPLOY_GITHUB_REF" : var.deploy_github_ref } : {}
+    var.deploy_github_sha != null ? { "DEPLOY_GITHUB_SHA" : var.deploy_github_sha } : {},
+    var.deploy_github_ref != null ? { "DEPLOY_GITHUB_REF" : var.deploy_github_ref } : {}
   )
 
   secrets = concat(