diff --git a/spring-aop/src/main/java/org/springframework/aop/target/AbstractBeanFactoryBasedTargetSource.java b/spring-aop/src/main/java/org/springframework/aop/target/AbstractBeanFactoryBasedTargetSource.java
index 7cf1c0d1b324..b33474bee775 100644
--- a/spring-aop/src/main/java/org/springframework/aop/target/AbstractBeanFactoryBasedTargetSource.java
+++ b/spring-aop/src/main/java/org/springframework/aop/target/AbstractBeanFactoryBasedTargetSource.java
@@ -95,7 +95,7 @@ public String getTargetBeanName() {
 	 * <p>Default is to detect the type automatically, through a {@code getType}
 	 * call on the BeanFactory (or even a full {@code getBean} call as fallback).
 	 */
-	public void setTargetClass(Class<?> targetClass) {
+	public synchronized void setTargetClass(Class<?> targetClass) {
 		this.targetClass = targetClass;
 	}
 
diff --git a/spring-jdbc/src/main/java/org/springframework/jdbc/support/JdbcAccessor.java b/spring-jdbc/src/main/java/org/springframework/jdbc/support/JdbcAccessor.java
index ec93e741d507..a718933a52a8 100644
--- a/spring-jdbc/src/main/java/org/springframework/jdbc/support/JdbcAccessor.java
+++ b/spring-jdbc/src/main/java/org/springframework/jdbc/support/JdbcAccessor.java
@@ -98,7 +98,7 @@ public void setDatabaseProductName(String dbName) {
 	 * @see org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator
 	 * @see org.springframework.jdbc.support.SQLStateSQLExceptionTranslator
 	 */
-	public void setExceptionTranslator(SQLExceptionTranslator exceptionTranslator) {
+	public synchronized void setExceptionTranslator(SQLExceptionTranslator exceptionTranslator) {
 		this.exceptionTranslator = exceptionTranslator;
 	}