diff --git a/spring-cloud-function-context/src/main/java/org/springframework/cloud/function/context/catalog/BeanFactoryAwareFunctionRegistry.java b/spring-cloud-function-context/src/main/java/org/springframework/cloud/function/context/catalog/BeanFactoryAwareFunctionRegistry.java
index 1734527cc..cdae8951e 100644
--- a/spring-cloud-function-context/src/main/java/org/springframework/cloud/function/context/catalog/BeanFactoryAwareFunctionRegistry.java
+++ b/spring-cloud-function-context/src/main/java/org/springframework/cloud/function/context/catalog/BeanFactoryAwareFunctionRegistry.java
@@ -105,7 +105,8 @@ public class BeanFactoryAwareFunctionRegistry extends SimpleFunctionRegistry imp
 
 		functionDefinition = this.normalizeFunctionDefinition(functionDefinition);
 		if (!StringUtils.hasText(functionDefinition)) {
-			logger.debug("Can't determine default function name");
+			logger.info("Can't determine default function definition. Please "
+					+ "use 'spring.cloud.function.definition' property to explicitly define it.");
 			return null;
 		}
 		FunctionInvocationWrapper function = this.doLookup(type, functionDefinition, expectedOutputMimeTypes);