diff --git a/spring-core/src/main/java/org/springframework/core/io/buffer/DefaultDataBuffer.java b/spring-core/src/main/java/org/springframework/core/io/buffer/DefaultDataBuffer.java
index def3ccf39649..4456f975bd9e 100644
--- a/spring-core/src/main/java/org/springframework/core/io/buffer/DefaultDataBuffer.java
+++ b/spring-core/src/main/java/org/springframework/core/io/buffer/DefaultDataBuffer.java
@@ -371,7 +371,7 @@ public DataBuffer split(int index) {
 				.slice();
 		this.writePosition = Math.max(this.writePosition, index) - index;
 		this.readPosition = Math.max(this.readPosition, index) - index;
-		capacity(this.byteBuffer.capacity());
+		this.capacity = this.byteBuffer.capacity();
 
 		return result;
 	}