diff --git a/spring-expression/src/main/java/org/springframework/expression/spel/ast/Elvis.java b/spring-expression/src/main/java/org/springframework/expression/spel/ast/Elvis.java
index 155730f9ec5..482355f41c1 100644
--- a/spring-expression/src/main/java/org/springframework/expression/spel/ast/Elvis.java
+++ b/spring-expression/src/main/java/org/springframework/expression/spel/ast/Elvis.java
@@ -51,7 +51,7 @@ public class Elvis extends SpelNodeImpl {
 	 * null-safe operator.
 	 * @since 7.1
 	 */
-	private @Nullable String unwrappedOptionalDescriptor;
+	private volatile @Nullable String unwrappedOptionalDescriptor;
 
 
 	public Elvis(int startPos, int endPos, SpelNodeImpl... args) {
diff --git a/spring-expression/src/main/java/org/springframework/expression/spel/ast/Indexer.java b/spring-expression/src/main/java/org/springframework/expression/spel/ast/Indexer.java
index 2a6ef4b2cce..464a73f07e9 100644
--- a/spring-expression/src/main/java/org/springframework/expression/spel/ast/Indexer.java
+++ b/spring-expression/src/main/java/org/springframework/expression/spel/ast/Indexer.java
@@ -108,7 +108,7 @@ public class Indexer extends SpelNodeImpl {
 
 	private final boolean nullSafe;
 
-	private @Nullable IndexedType indexedType;
+	private volatile @Nullable IndexedType indexedType;
 
 	private volatile @Nullable String originalPrimitiveExitTypeDescriptor;
 
diff --git a/spring-expression/src/main/java/org/springframework/expression/spel/ast/MethodReference.java b/spring-expression/src/main/java/org/springframework/expression/spel/ast/MethodReference.java
index 2b37979548c..ace09f1edd2 100644
--- a/spring-expression/src/main/java/org/springframework/expression/spel/ast/MethodReference.java
+++ b/spring-expression/src/main/java/org/springframework/expression/spel/ast/MethodReference.java
@@ -75,7 +75,7 @@ public class MethodReference extends SpelNodeImpl {
 
 	private final String name;
 
-	private @Nullable Character originalPrimitiveExitTypeDescriptor;
+	private volatile @Nullable Character originalPrimitiveExitTypeDescriptor;
 
 	/**
 	 * Tracks whether an {@link Optional} was unwrapped in
@@ -84,7 +84,7 @@ public class MethodReference extends SpelNodeImpl {
 	 * compiled expression.
 	 * @since 7.1
 	 */
-	private boolean unwrapOptional;
+	private volatile boolean unwrapOptional;
 
 	private volatile @Nullable CachedMethodExecutor cachedExecutor;
 
diff --git a/spring-expression/src/main/java/org/springframework/expression/spel/ast/PropertyOrFieldReference.java b/spring-expression/src/main/java/org/springframework/expression/spel/ast/PropertyOrFieldReference.java
index 07313f1a9bd..b5f5ff27f69 100644
--- a/spring-expression/src/main/java/org/springframework/expression/spel/ast/PropertyOrFieldReference.java
+++ b/spring-expression/src/main/java/org/springframework/expression/spel/ast/PropertyOrFieldReference.java
@@ -70,7 +70,7 @@ public class PropertyOrFieldReference extends SpelNodeImpl {
 
 	private final String name;
 
-	private @Nullable String originalPrimitiveExitTypeDescriptor;
+	private volatile @Nullable String originalPrimitiveExitTypeDescriptor;
 
 	/**
 	 * Tracks whether an {@link Optional} was unwrapped in
@@ -78,7 +78,7 @@ public class PropertyOrFieldReference extends SpelNodeImpl {
 	 * null-safe operator and therefore needs to be unwrapped in a compiled expression.
 	 * @since 7.1
 	 */
-	private boolean unwrapOptional;
+	private volatile boolean unwrapOptional;
 
 	private volatile @Nullable PropertyAccessor cachedReadAccessor;