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 d463af842a..16b444dfb4 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
@@ -94,7 +94,7 @@ public class DefaultDataBuffer implements DataBuffer {
 
 	private void setNativeBuffer(ByteBuffer byteBuffer) {
 		this.byteBuffer = byteBuffer;
-		this.capacity = byteBuffer.remaining();
+		this.capacity = byteBuffer.capacity();
 	}