diff --git a/org.springframework.integration/src/main/java/org/springframework/integration/handler/ArgumentArrayMessageMapper.java b/org.springframework.integration/src/main/java/org/springframework/integration/handler/ArgumentArrayMessageMapper.java
index ee86e3bea3..f8e72be214 100644
--- a/org.springframework.integration/src/main/java/org/springframework/integration/handler/ArgumentArrayMessageMapper.java
+++ b/org.springframework.integration/src/main/java/org/springframework/integration/handler/ArgumentArrayMessageMapper.java
@@ -118,10 +118,10 @@ public class ArgumentArrayMessageMapper implements InboundMessageMapper<Object[]
 		registry.removeConvertible(Map.class, Object.class);
 		registry.removeConvertible(Object.class, String.class);
 		registry.addConverter(new Converter<Number, String>() {
-			public String convert(Number source) {return null;}
+			public String convert(Number source) {return source.toString();}
 		});
 		registry.addConverter(new Converter<Date, String>() {
-			public String convert(Date source) {return null;}
+			public String convert(Date source) {return source.toString();}
 		});
 	}