diff --git a/docs/guide/rts.md b/docs/guide/rts.md
index 2cdc62175..9b071b46e 100644
--- a/docs/guide/rts.md
+++ b/docs/guide/rts.md
@@ -16,7 +16,8 @@ Header {
 }
 
 Body {
-  primary uint8 base;
+  uint32 time;
+  uint8 base;
 }
 ```
 
diff --git a/src/core/streams/rts.ts b/src/core/streams/rts.ts
index 438ca1d18..2d9b0d0e9 100644
--- a/src/core/streams/rts.ts
+++ b/src/core/streams/rts.ts
@@ -33,6 +33,7 @@ export class RtsmReadStream extends ReadStream {
 
   body() {
     return {
+      time: this.uint32(),
       base: this.uint8(),
     };
   }
@@ -56,6 +57,7 @@ export class RtsmWriteStream extends WriteStream {
   }
 
   body(base: number) {
+    this.uint32(Math.round(Date.now() / 1000));
     this.uint8(base);
   }
 }