diff --git a/crates/service/job/inference_job/src/http_server/endpoints/health_check_handler.rs b/crates/service/job/inference_job/src/http_server/endpoints/health_check_handler.rs
index 6301d2aa06..7886262571 100644
--- a/crates/service/job/inference_job/src/http_server/endpoints/health_check_handler.rs
+++ b/crates/service/job/inference_job/src/http_server/endpoints/health_check_handler.rs
@@ -16,6 +16,9 @@ use crate::http_server::http_server_shared_state::HttpServerSharedState;
 #[derive(Serialize)]
 pub struct HealthCheckResponse {
   pub success: bool,
+
+  /// The server goes unhealthy when the consecutive job failure count exceeds
+  /// a configured threshold.
   pub is_healthy: bool,
 
   pub consecutive_failure_count: u64,
diff --git a/crates/service/job/inference_job/src/job/job_types/workflow/live_portrait/command_args.rs b/crates/service/job/inference_job/src/job/job_types/workflow/live_portrait/command_args.rs
index 810bc6fa37..9aa819271e 100644
--- a/crates/service/job/inference_job/src/job/job_types/workflow/live_portrait/command_args.rs
+++ b/crates/service/job/inference_job/src/job/job_types/workflow/live_portrait/command_args.rs
@@ -32,8 +32,9 @@ impl CommandArgs for LivePortraitCommandArgs<'_> {
     command.push_str(" --output-filename ");
     command.push_str(&path_to_string(self.output_file));
 
-    command.push_str(" --input-is-image ");
-    command.push_str(bool_to_str(self.input_is_image));
+    if self.input_is_image {
+      command.push_str(" --input-is-image ");
+    }
 
     command.push_str(" ");