diff --git a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/redis/PropertiesRedisConnectionDetails.java b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/redis/PropertiesRedisConnectionDetails.java
index f562b81ebf6a..1efebda45e85 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/redis/PropertiesRedisConnectionDetails.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/redis/PropertiesRedisConnectionDetails.java
@@ -60,8 +60,7 @@ public Standalone getStandalone() {
 		if (this.properties.getUrl() != null) {
 			ConnectionInfo connectionInfo = ConnectionInfo.of(this.properties.getUrl());
 			return Standalone.of(connectionInfo.getUri().getHost(), connectionInfo.getUri().getPort(),
-					(connectionInfo.getDatabase() != null) ? connectionInfo.getDatabase()
-							: this.properties.getDatabase());
+					connectionInfo.getDatabase());
 		}
 		return Standalone.of(this.properties.getHost(), this.properties.getPort(), this.properties.getDatabase());
 	}
@@ -77,7 +76,7 @@ public Sentinel getSentinel() {
 
 			@Override
 			public int getDatabase() {
-				return PropertiesRedisConnectionDetails.this.properties.getDatabase();
+				return getStandalone().getDatabase();
 			}
 
 			@Override
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/redis/RedisConnectionConfiguration.java b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/redis/RedisConnectionConfiguration.java
index 035377ce7319..f24e4aa74ff5 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/redis/RedisConnectionConfiguration.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/redis/RedisConnectionConfiguration.java
@@ -191,9 +191,9 @@ static final class ConnectionInfo {
 
 		private final String password;
 
-		private final Integer database;
+		private final int database;
 
-		private ConnectionInfo(URI uri, boolean useSsl, String username, String password, Integer database) {
+		private ConnectionInfo(URI uri, boolean useSsl, String username, String password, int database) {
 			this.uri = uri;
 			this.useSsl = useSsl;
 			this.username = username;
@@ -217,7 +217,7 @@ String getPassword() {
 			return this.password;
 		}
 
-		Integer getDatabase() {
+		int getDatabase() {
 			return this.database;
 		}
 
@@ -242,7 +242,7 @@ static ConnectionInfo of(String url) {
 						password = candidate;
 					}
 				}
-				Integer database = null;
+				int database = 0;
 				if (StringUtils.hasText(uri.getPath())) {
 					String[] pathSplit = uri.getPath().split("/", 2);
 					if (pathSplit.length > 1 && !pathSplit[1].isEmpty()) {
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/redis/PropertiesRedisConnectionDetailsTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/redis/PropertiesRedisConnectionDetailsTests.java
index e1b4bc16c038..2d93bcdc65c8 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/redis/PropertiesRedisConnectionDetailsTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/redis/PropertiesRedisConnectionDetailsTests.java
@@ -114,7 +114,7 @@ void standaloneIsConfiguredFromUrlWithoutDatabase() {
 		RedisConnectionDetails.Standalone standalone = connectionDetails.getStandalone();
 		assertThat(standalone.getHost()).isEqualTo("example.com");
 		assertThat(standalone.getPort()).isEqualTo(1234);
-		assertThat(standalone.getDatabase()).isEqualTo(5);
+		assertThat(standalone.getDatabase()).isEqualTo(0);
 	}
 
 	@Test
@@ -144,9 +144,22 @@ void sentinelIsConfigured() {
 		RedisProperties.Sentinel sentinel = new RedisProperties.Sentinel();
 		sentinel.setNodes(List.of("localhost:1111", "127.0.0.1:2222", "[::1]:3333"));
 		this.properties.setSentinel(sentinel);
+		this.properties.setDatabase(5);
 		PropertiesRedisConnectionDetails connectionDetails = new PropertiesRedisConnectionDetails(this.properties);
 		assertThat(connectionDetails.getSentinel().getNodes()).containsExactly(new Node("localhost", 1111),
 				new Node("127.0.0.1", 2222), new Node("[::1]", 3333));
+		assertThat(connectionDetails.getSentinel().getDatabase()).isEqualTo(5);
+	}
+
+	@Test
+	void sentinelDatabaseIsConfiguredFromUrl() {
+		RedisProperties.Sentinel sentinel = new RedisProperties.Sentinel();
+		sentinel.setNodes(List.of("localhost:1111", "127.0.0.1:2222", "[::1]:3333"));
+		this.properties.setSentinel(sentinel);
+		this.properties.setUrl("redis://example.com:1234/9999");
+		this.properties.setDatabase(5);
+		PropertiesRedisConnectionDetails connectionDetails = new PropertiesRedisConnectionDetails(this.properties);
+		assertThat(connectionDetails.getSentinel().getDatabase()).isEqualTo(9999);
 	}
 
 }