diff --git a/src/main/java/org/springframework/data/r2dbc/core/DefaultDatabaseClient.java b/src/main/java/org/springframework/data/r2dbc/core/DefaultDatabaseClient.java
index e59c23b..c90c8ec 100644
--- a/src/main/java/org/springframework/data/r2dbc/core/DefaultDatabaseClient.java
+++ b/src/main/java/org/springframework/data/r2dbc/core/DefaultDatabaseClient.java
@@ -1539,7 +1539,7 @@ class DefaultDatabaseClient implements DatabaseClient, ConnectionAccessor {
 		}
 
 		@Override
-		public void bind(Object identifier, Object value) {
+		public void bind(String identifier, Object value) {
 			this.statement.bind(identifier, value);
 		}
 
@@ -1549,7 +1549,7 @@ class DefaultDatabaseClient implements DatabaseClient, ConnectionAccessor {
 		}
 
 		@Override
-		public void bindNull(Object identifier, Class<?> type) {
+		public void bindNull(String identifier, Class<?> type) {
 			this.statement.bindNull(identifier, type);
 		}
 
diff --git a/src/main/java/org/springframework/data/r2dbc/dialect/BindTarget.java b/src/main/java/org/springframework/data/r2dbc/dialect/BindTarget.java
index b8aeb70..3eeac17 100644
--- a/src/main/java/org/springframework/data/r2dbc/dialect/BindTarget.java
+++ b/src/main/java/org/springframework/data/r2dbc/dialect/BindTarget.java
@@ -33,7 +33,7 @@ public interface BindTarget {
 	 * @param identifier the identifier to bind to.
 	 * @param value the value to bind.
 	 */
-	void bind(Object identifier, Object value);
+	void bind(String identifier, Object value);
 
 	/**
 	 * Bind a value to an index. Indexes are zero-based.
@@ -49,7 +49,7 @@ public interface BindTarget {
 	 * @param identifier the identifier to bind to.
 	 * @param type the type of {@literal null} value.
 	 */
-	void bindNull(Object identifier, Class<?> type);
+	void bindNull(String identifier, Class<?> type);
 
 	/**
 	 * Bind a {@literal null} value.
diff --git a/src/test/java/org/springframework/data/r2dbc/core/NamedParameterUtilsUnitTests.java b/src/test/java/org/springframework/data/r2dbc/core/NamedParameterUtilsUnitTests.java
index b96aa30..9b67157 100644
--- a/src/test/java/org/springframework/data/r2dbc/core/NamedParameterUtilsUnitTests.java
+++ b/src/test/java/org/springframework/data/r2dbc/core/NamedParameterUtilsUnitTests.java
@@ -313,7 +313,7 @@ public class NamedParameterUtilsUnitTests {
 
 		operation.bindTo(new BindTarget() {
 			@Override
-			public void bind(Object identifier, Object value) {
+			public void bind(String identifier, Object value) {
 				throw new UnsupportedOperationException();
 			}
 
@@ -324,7 +324,7 @@ public class NamedParameterUtilsUnitTests {
 			}
 
 			@Override
-			public void bindNull(Object identifier, Class<?> type) {
+			public void bindNull(String identifier, Class<?> type) {
 				throw new UnsupportedOperationException();
 			}
 
@@ -351,7 +351,7 @@ public class NamedParameterUtilsUnitTests {
 
 		operation.bindTo(new BindTarget() {
 			@Override
-			public void bind(Object identifier, Object value) {
+			public void bind(String identifier, Object value) {
 				throw new UnsupportedOperationException();
 			}
 
@@ -361,7 +361,7 @@ public class NamedParameterUtilsUnitTests {
 			}
 
 			@Override
-			public void bindNull(Object identifier, Class<?> type) {
+			public void bindNull(String identifier, Class<?> type) {
 				throw new UnsupportedOperationException();
 			}
 
@@ -388,7 +388,7 @@ public class NamedParameterUtilsUnitTests {
 
 		operation.bindTo(new BindTarget() {
 			@Override
-			public void bind(Object identifier, Object value) {
+			public void bind(String identifier, Object value) {
 				throw new UnsupportedOperationException();
 			}
 
@@ -398,7 +398,7 @@ public class NamedParameterUtilsUnitTests {
 			}
 
 			@Override
-			public void bindNull(Object identifier, Class<?> type) {
+			public void bindNull(String identifier, Class<?> type) {
 				throw new UnsupportedOperationException();
 			}