diff --git a/spring-r2dbc/src/main/java/org/springframework/r2dbc/core/DefaultFetchSpec.java b/spring-r2dbc/src/main/java/org/springframework/r2dbc/core/DefaultFetchSpec.java
index d96cad5bcc2..f6de827037e 100644
--- a/spring-r2dbc/src/main/java/org/springframework/r2dbc/core/DefaultFetchSpec.java
+++ b/spring-r2dbc/src/main/java/org/springframework/r2dbc/core/DefaultFetchSpec.java
@@ -61,7 +61,7 @@ class DefaultFetchSpec<T> implements FetchSpec<T> {
 	public Mono<T> one() {
 		return all().singleOrEmpty()
 			.onErrorMap(IndexOutOfBoundsException.class, ex -> {
-				String message = String.format("Query [%s] returned non unique result.", resultFunction.getSql());
+				String message = String.format("Query [%s] returned non unique result.", this.resultFunction.getSql());
 				return new IncorrectResultSizeDataAccessException(message, 1);
 			});
 	}