diff --git a/spring-web/src/main/java/org/springframework/http/codec/multipart/MultipartParser.java b/spring-web/src/main/java/org/springframework/http/codec/multipart/MultipartParser.java
index f3112515eef..789a3726e47 100644
--- a/spring-web/src/main/java/org/springframework/http/codec/multipart/MultipartParser.java
+++ b/spring-web/src/main/java/org/springframework/http/codec/multipart/MultipartParser.java
@@ -559,6 +559,7 @@ final class MultipartParser extends BaseSubscriber<DataBuffer> {
 				}
 				else /* if (len == 0) */ {
 					// buffer starts with complete delimiter, flush out the previous buffers
+					DataBufferUtils.release(boundaryBuffer);
 					flush();
 				}