diff --git a/spring-integration-http/src/main/java/org/springframework/integration/http/support/DefaultHttpHeaderMapper.java b/spring-integration-http/src/main/java/org/springframework/integration/http/support/DefaultHttpHeaderMapper.java
index 2bdaa9771e..7f1a69531f 100644
--- a/spring-integration-http/src/main/java/org/springframework/integration/http/support/DefaultHttpHeaderMapper.java
+++ b/spring-integration-http/src/main/java/org/springframework/integration/http/support/DefaultHttpHeaderMapper.java
@@ -462,7 +462,7 @@ public class DefaultHttpHeaderMapper implements HeaderMapper<HttpHeaders>, BeanF
 						if (logger.isDebugEnabled()) {
 							logger.debug(MessageFormat.format("setting headerName=[{0}], value={1}", name, value));
 						}
-						if (CONTENT_TYPE.equals(name)) {
+						if (CONTENT_TYPE.equalsIgnoreCase(name)) {
 							name = MessageHeaders.CONTENT_TYPE;
 						}
 						this.setMessageHeader(target, name, value);
diff --git a/spring-integration-http/src/test/java/org/springframework/integration/http/support/DefaultHttpHeaderMapperFromMessageInboundTests.java b/spring-integration-http/src/test/java/org/springframework/integration/http/support/DefaultHttpHeaderMapperFromMessageInboundTests.java
index ca162933f2..ffe4c70077 100644
--- a/spring-integration-http/src/test/java/org/springframework/integration/http/support/DefaultHttpHeaderMapperFromMessageInboundTests.java
+++ b/spring-integration-http/src/test/java/org/springframework/integration/http/support/DefaultHttpHeaderMapperFromMessageInboundTests.java
@@ -581,6 +581,15 @@ public class DefaultHttpHeaderMapperFromMessageInboundTests {
 		assertEquals(MediaType.valueOf("text/plain"), httpHeaders.getContentType());
 	}
 
+	@Test
+	public void testContentTypeInboundHeader() throws Exception {
+		HeaderMapper<HttpHeaders> mapper = DefaultHttpHeaderMapper.inboundMapper();
+		HttpHeaders headers = new HttpHeaders();
+		headers.add(HttpHeaders.CONTENT_TYPE.toLowerCase(), "text/plain");
+		Map<String, ?> result = mapper.toHeaders(headers);
+		assertEquals(MediaType.valueOf("text/plain"), result.get(MessageHeaders.CONTENT_TYPE));
+	}
+
 
 	public static class TestClass {