diff --git a/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/AbstractMessageConverterMethodProcessor.java b/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/AbstractMessageConverterMethodProcessor.java
index fd0b45c8122..7e37632960b 100644
--- a/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/AbstractMessageConverterMethodProcessor.java
+++ b/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/AbstractMessageConverterMethodProcessor.java
@@ -196,7 +196,7 @@ public abstract class AbstractMessageConverterMethodProcessor extends AbstractMe
 	 */
 	private MediaType getMostSpecificMediaType(MediaType acceptType, MediaType produceType) {
 		produceType = produceType.copyQualityValue(acceptType);
-		return MediaType.SPECIFICITY_COMPARATOR.compare(acceptType, produceType) < 0 ? acceptType : produceType;
+		return MediaType.SPECIFICITY_COMPARATOR.compare(acceptType, produceType) <= 0 ? acceptType : produceType;
 	}
 
 }
\ No newline at end of file
diff --git a/spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/RequestResponseBodyMethodProcessorMockTests.java b/spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/RequestResponseBodyMethodProcessorMockTests.java
index 0788265b1c3..c74159b0fea 100644
--- a/spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/RequestResponseBodyMethodProcessorMockTests.java
+++ b/spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/RequestResponseBodyMethodProcessorMockTests.java
@@ -301,35 +301,6 @@ public class RequestResponseBodyMethodProcessorMockTests {
 		verify(messageConverter);
 	}
 
-	// SPR-9160
-
-	@Test
-	public void handleReturnValueSortByQuality() throws Exception {
-		this.servletRequest.addHeader("Accept", "text/plain; q=0.5, application/json");
-
-		List<HttpMessageConverter<?>> converters = new ArrayList<HttpMessageConverter<?>>();
-		converters.add(new MappingJackson2HttpMessageConverter());
-		converters.add(new StringHttpMessageConverter());
-		RequestResponseBodyMethodProcessor handler = new RequestResponseBodyMethodProcessor(converters);
-
-		handler.writeWithMessageConverters("Foo", returnTypeStringProduces, webRequest);
-
-		assertEquals("application/json;charset=UTF-8", servletResponse.getHeader("Content-Type"));
-	}
-
-	@Test
-	public void handleReturnValueString() throws Exception {
-		List<HttpMessageConverter<?>>converters = new ArrayList<HttpMessageConverter<?>>();
-		converters.add(new ByteArrayHttpMessageConverter());
-		converters.add(new StringHttpMessageConverter());
-
-		processor = new RequestResponseBodyMethodProcessor(converters);
-		processor.handleReturnValue("Foo", returnTypeString, mavContainer, webRequest);
-
-		assertEquals("text/plain;charset=ISO-8859-1", servletResponse.getHeader("Content-Type"));
-		assertEquals("Foo", servletResponse.getContentAsString());
-	}
-
 
 	@ResponseBody
 	public String handle1(@RequestBody String s, int i) {
diff --git a/spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/RequestResponseBodyMethodProcessorTests.java b/spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/RequestResponseBodyMethodProcessorTests.java
index 1a4726e5b09..1dc65237739 100644
--- a/spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/RequestResponseBodyMethodProcessorTests.java
+++ b/spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/RequestResponseBodyMethodProcessorTests.java
@@ -143,12 +143,25 @@ public class RequestResponseBodyMethodProcessorTests {
 		assertEquals("Foo", servletResponse.getContentAsString());
 	}
 
+	@Test
+	public void handleReturnValueStringAcceptCharset() throws Exception {
+		this.servletRequest.addHeader("Accept", "text/plain;charset=UTF-8");
+
+		List<HttpMessageConverter<?>> converters = new ArrayList<HttpMessageConverter<?>>();
+		converters.add(new ByteArrayHttpMessageConverter());
+		converters.add(new StringHttpMessageConverter());
+		RequestResponseBodyMethodProcessor processor = new RequestResponseBodyMethodProcessor(converters);
+
+		processor.writeWithMessageConverters("Foo", returnTypeString, webRequest);
+
+		assertEquals("text/plain;charset=UTF-8", servletResponse.getHeader("Content-Type"));
+	}
+
 
 	public String handle(@RequestBody List<SimpleBean> list, @RequestBody SimpleBean simpleBean) {
 		return null;
 	}
 
-
 	private static class SimpleBean {
 
 		private String name;