diff --git a/spring-web/src/main/java/org/springframework/http/codec/multipart/PartGenerator.java b/spring-web/src/main/java/org/springframework/http/codec/multipart/PartGenerator.java
index 39aa9149faa..3e684a47fb2 100644
--- a/spring-web/src/main/java/org/springframework/http/codec/multipart/PartGenerator.java
+++ b/spring-web/src/main/java/org/springframework/http/codec/multipart/PartGenerator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,6 +20,7 @@ import java.io.IOException;
 import java.io.UncheckedIOException;
 import java.nio.ByteBuffer;
 import java.nio.channels.WritableByteChannel;
+import java.nio.charset.Charset;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.StandardOpenOption;
@@ -53,7 +54,7 @@ import org.springframework.util.FastByteArrayOutputStream;
 
 /**
  * Subscribes to a token stream (i.e. the result of
- * {@link MultipartParser#parse(Flux, byte[], int)}, and produces a flux of {@link Part} objects.
+ * {@link MultipartParser#parse(Flux, byte[], int, Charset)}, and produces a flux of {@link Part} objects.
  *
  * @author Arjen Poutsma
  * @since 5.3
@@ -577,6 +578,9 @@ final class PartGenerator extends BaseSubscriber<MultipartParser.Token> {
 
 		private WritingFileState createFileState(Path directory) {
 			try {
+				if (!Files.exists(directory)) {
+					Files.createDirectory(directory);
+				}
 				Path tempFile = Files.createTempFile(directory, null, ".multipart");
 				if (logger.isTraceEnabled()) {
 					logger.trace("Storing multipart data in file " + tempFile);