diff --git a/spring-web/src/main/java/org/springframework/http/converter/multipart/PartGenerator.java b/spring-web/src/main/java/org/springframework/http/converter/multipart/PartGenerator.java
index d8e432e60bb..479ba37e0b7 100644
--- a/spring-web/src/main/java/org/springframework/http/converter/multipart/PartGenerator.java
+++ b/spring-web/src/main/java/org/springframework/http/converter/multipart/PartGenerator.java
@@ -86,6 +86,7 @@ final class PartGenerator implements MultipartParser.PartListener {
 
 	@Override
 	public void onHeaders(HttpHeaders headers) {
+		// no-op on the first part, since InitialState does not override onComplete()
 		this.state.onComplete();
 		if (isFormField(headers)) {
 			this.state = new FormFieldState(headers);