diff --git a/src/logging/log-backend.ts b/src/logging/log-backend.ts
index 442998c06..c286dc799 100644
--- a/src/logging/log-backend.ts
+++ b/src/logging/log-backend.ts
@@ -1,4 +1,20 @@
-export type LogMessage = Dictionary<any>;
+type BaseLogMessage = {
+	message: string;
+	isStdErr?: boolean;
+	timestamp?: number;
+};
+export type LogMessage = BaseLogMessage &
+	(
+		| {
+				serviceId?: number;
+				imageId?: number;
+				isSystem?: false;
+		  }
+		| {
+				message: string;
+				isSystem: true;
+		  }
+	);
 
 export abstract class LogBackend {
 	public unmanaged: boolean;