diff --git a/spring-jms/src/main/java/org/springframework/jms/support/JmsAccessor.java b/spring-jms/src/main/java/org/springframework/jms/support/JmsAccessor.java
index e7a2ff4f8c..c196a84b56 100644
--- a/spring-jms/src/main/java/org/springframework/jms/support/JmsAccessor.java
+++ b/spring-jms/src/main/java/org/springframework/jms/support/JmsAccessor.java
@@ -144,9 +144,9 @@ public abstract class JmsAccessor implements InitializingBean {
 	 */
 	public void setSessionAcknowledgeModeName(String constantName) {
 		Assert.hasText(constantName, "'constantName' must not be null or blank");
-		Integer acknowledgeMode = sessionConstants.get(constantName);
-		Assert.notNull(acknowledgeMode, "Only acknowledge mode constants allowed");
-		setSessionAcknowledgeMode(acknowledgeMode);
+		Integer sessionAcknowledgeMode = sessionConstants.get(constantName);
+		Assert.notNull(sessionAcknowledgeMode, "Only acknowledge mode constants allowed");
+		this.sessionAcknowledgeMode = sessionAcknowledgeMode;
 	}
 
 	/**
@@ -167,6 +167,8 @@ public abstract class JmsAccessor implements InitializingBean {
 	 * @see jakarta.jms.Connection#createSession(boolean, int)
 	 */
 	public void setSessionAcknowledgeMode(int sessionAcknowledgeMode) {
+		Assert.isTrue(sessionConstants.containsValue(sessionAcknowledgeMode),
+				"Only values of acknowledge mode constants allowed");
 		this.sessionAcknowledgeMode = sessionAcknowledgeMode;
 	}
 
diff --git a/spring-jms/src/test/java/org/springframework/jms/support/JmsAccessorTests.java b/spring-jms/src/test/java/org/springframework/jms/support/JmsAccessorTests.java
index 8e914e9915..69f4f9225a 100644
--- a/spring-jms/src/test/java/org/springframework/jms/support/JmsAccessorTests.java
+++ b/spring-jms/src/test/java/org/springframework/jms/support/JmsAccessorTests.java
@@ -96,11 +96,21 @@ class JmsAccessorTests {
 		assertThat(uniqueValues).hasSize(4);
 	}
 
+	@Test
+	void setSessionAcknowledgeMode() {
+		assertThatIllegalArgumentException().isThrownBy(() -> accessor.setSessionAcknowledgeMode(999));
 
-	private static Stream<String> streamAcknowledgeModeConstants() {
-		return Arrays.stream(Session.class.getFields())
-				.filter(ReflectionUtils::isPublicStaticFinal)
-				.map(Field::getName);
+		accessor.setSessionAcknowledgeMode(Session.AUTO_ACKNOWLEDGE);
+		assertThat(accessor.getSessionAcknowledgeMode()).isEqualTo(Session.AUTO_ACKNOWLEDGE);
+
+		accessor.setSessionAcknowledgeMode(Session.CLIENT_ACKNOWLEDGE);
+		assertThat(accessor.getSessionAcknowledgeMode()).isEqualTo(Session.CLIENT_ACKNOWLEDGE);
+
+		accessor.setSessionAcknowledgeMode(Session.DUPS_OK_ACKNOWLEDGE);
+		assertThat(accessor.getSessionAcknowledgeMode()).isEqualTo(Session.DUPS_OK_ACKNOWLEDGE);
+
+		accessor.setSessionAcknowledgeMode(Session.SESSION_TRANSACTED);
+		assertThat(accessor.getSessionAcknowledgeMode()).isEqualTo(Session.SESSION_TRANSACTED);
 	}
 
 	@Test
@@ -110,4 +120,11 @@ class JmsAccessorTests {
 		assertThat(accessor.isClientAcknowledge(session)).isTrue();
 	}
 
+
+	private static Stream<String> streamAcknowledgeModeConstants() {
+		return Arrays.stream(Session.class.getFields())
+				.filter(ReflectionUtils::isPublicStaticFinal)
+				.map(Field::getName);
+	}
+
 }