diff --git a/org.springframework.integration.httpinvoker/src/main/java/org/springframework/integration/httpinvoker/config/spring-integration-httpinvoker-1.0.xsd b/org.springframework.integration.httpinvoker/src/main/java/org/springframework/integration/httpinvoker/config/spring-integration-httpinvoker-1.0.xsd
index 8760e1c850..187dfc7f6e 100644
--- a/org.springframework.integration.httpinvoker/src/main/java/org/springframework/integration/httpinvoker/config/spring-integration-httpinvoker-1.0.xsd
+++ b/org.springframework.integration.httpinvoker/src/main/java/org/springframework/integration/httpinvoker/config/spring-integration-httpinvoker-1.0.xsd
@@ -59,8 +59,24 @@
 		</xsd:annotation>
 		<xsd:attribute name="id" type="xsd:ID"/>
 		<xsd:attribute name="name" type="xsd:string"/>
-		<xsd:attribute name="request-channel" type="xsd:string" use="required"/>
-		<xsd:attribute name="reply-channel" type="xsd:string"/>
+		<xsd:attribute name="request-channel" type="xsd:string" use="required">
+			<xsd:annotation>
+				<xsd:appinfo>
+					<tool:annotation kind="ref">
+						<tool:expected-type type="org.springframework.integration.core.MessageChannel"/>
+					</tool:annotation>
+				</xsd:appinfo>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="reply-channel" type="xsd:string">
+			<xsd:annotation>
+				<xsd:appinfo>
+					<tool:annotation kind="ref">
+						<tool:expected-type type="org.springframework.integration.core.MessageChannel"/>
+					</tool:annotation>
+				</xsd:appinfo>
+			</xsd:annotation>
+		</xsd:attribute>
 		<xsd:attribute name="request-timeout" type="xsd:string"/>
 		<xsd:attribute name="reply-timeout" type="xsd:string"/>
 	</xsd:complexType>