diff --git a/src/SapiEmitter.php b/src/SapiEmitter.php
index 5130d4730..fcef7551a 100644
--- a/src/SapiEmitter.php
+++ b/src/SapiEmitter.php
@@ -14,7 +14,7 @@
 use function strtolower;
 
 /**
- * SapiEmitter sends a response using PHP Server API.
+ * SapiEmitter sends a response using standard PHP Server API i.e. with {@see header()} and "echo".
  */
 final class SapiEmitter
 {