diff --git a/unknow-server-jaxrs/src/main/java/unknow/server/http/jaxrs/JaxrsReq.java b/unknow-server-jaxrs/src/main/java/unknow/server/http/jaxrs/JaxrsReq.java
index 2917d9e0..61c13724 100644
--- a/unknow-server-jaxrs/src/main/java/unknow/server/http/jaxrs/JaxrsReq.java
+++ b/unknow-server-jaxrs/src/main/java/unknow/server/http/jaxrs/JaxrsReq.java
@@ -71,10 +71,10 @@ public MediaType getContentType() {
 		return h == null ? MediaType.APPLICATION_OCTET_STREAM_TYPE : MediaTypeDelegate.INSTANCE.fromString(h);
 	}
 
-	public MediaType getAccepted(MTPredicate allowed, MediaType def) {
+	public MediaType getAccepted(MTPredicate allowed) {
 		String a = r.getHeader("accept");
 		if (a == null)
-			return accept = def;
+			a = "*/*";
 		int i;
 		int l = 0;
 		double lq = -1;
diff --git a/unknow-server-jaxrs/src/test/java/unknow/server/http/jaxrs/JaxrsReqTest.java b/unknow-server-jaxrs/src/test/java/unknow/server/http/jaxrs/JaxrsReqTest.java
index 933302c7..105972d5 100644
--- a/unknow-server-jaxrs/src/test/java/unknow/server/http/jaxrs/JaxrsReqTest.java
+++ b/unknow-server-jaxrs/src/test/java/unknow/server/http/jaxrs/JaxrsReqTest.java
@@ -57,7 +57,7 @@ public static final Stream<Arguments> accept() {
 				Arguments.of(null, "*/*", MTPredicate.NONE),
 				Arguments.of(MediaType.WILDCARD_TYPE, "*/*", MTPredicate.ANY),
 				Arguments.of(MediaType.TEXT_XML_TYPE, "text/plain,text/xml", new MTPredicate.OneOf(MediaType.TEXT_XML_TYPE)),
-				Arguments.of(MediaType.WILDCARD_TYPE, null, new MTPredicate.OneOf(MediaType.TEXT_XML_TYPE)),
+				Arguments.of(MediaType.TEXT_XML_TYPE, null, new MTPredicate.OneOf(MediaType.TEXT_XML_TYPE)),
 				Arguments.of(MediaType.TEXT_XML_TYPE, "*/*",new MTPredicate.OneOf(MediaType.TEXT_XML_TYPE)),
 				Arguments.of(new MediaType("text", "json"), "text/xml;q=.5,text/json", MTPredicate.ANY));
 		//@formatter:on
@@ -70,6 +70,6 @@ void accept(MediaType expected, String accept, MTPredicate allowed) {
 		HttpServletRequest r = Mockito.mock(HttpServletRequest.class);
 		Mockito.when(r.getHeader("accept")).thenReturn(accept);
 		JaxrsReq req = new JaxrsReq(r, Collections.emptyList());
-		assertEquals(expected, req.getAccepted(allowed, MediaType.WILDCARD_TYPE));
+		assertEquals(expected, req.getAccepted(allowed));
 	}
 }
\ No newline at end of file
diff --git a/unknow-server-maven/src/main/java/unknow/server/maven/jaxrs/JaxRsServletBuilder.java b/unknow-server-maven/src/main/java/unknow/server/maven/jaxrs/JaxRsServletBuilder.java
index d3aa485b..e7cffd93 100644
--- a/unknow-server-maven/src/main/java/unknow/server/maven/jaxrs/JaxRsServletBuilder.java
+++ b/unknow-server-maven/src/main/java/unknow/server/maven/jaxrs/JaxRsServletBuilder.java
@@ -398,11 +398,8 @@ private static Map<List<JaxrsMapping>, Collection<String>> buildConsumeMap(List<
 	 * @throws MojoFailureException in case of error
 	 */
 	private BlockStmt buildProduces(BlockStmt b, Collection<JaxrsMapping> mappings) throws MojoFailureException {
-		Map<String, JaxrsMapping> produce = new HashMap<>();
-		String defaultType = null;
+		Map<String, JaxrsMapping> produce = new LinkedHashMap<>();
 		for (JaxrsMapping m : mappings) {
-			if (defaultType == null)
-				defaultType = m.produce[0];
 			for (String p : m.produce) {
 				JaxrsMapping other = produce.put(p, m);
 				if (other != null)
@@ -410,7 +407,7 @@ private BlockStmt buildProduces(BlockStmt b, Collection<JaxrsMapping> mappings)
 			}
 		}
 
-		MethodCallExpr accept = new MethodCallExpr(new NameExpr("req"), "getAccepted", CodeGenUtils.list(mt.predicate(types, produce.keySet()), mt.type(types, defaultType)));
+		MethodCallExpr accept = new MethodCallExpr(new NameExpr("req"), "getAccepted", CodeGenUtils.list(mt.predicate(types, produce.keySet())));
 
 		JaxrsMapping def = produce.remove("*/*");
 		Statement stmt = new ThrowStmt(new ObjectCreationExpr(null, types.getClass(NotAcceptableException.class), CodeGenUtils.list()));
diff --git a/unknow-server-maven/src/main/java/unknow/server/maven/jaxrs/MediaTypesBuilder.java b/unknow-server-maven/src/main/java/unknow/server/maven/jaxrs/MediaTypesBuilder.java
index d9e3907e..9cb49f24 100644
--- a/unknow-server-maven/src/main/java/unknow/server/maven/jaxrs/MediaTypesBuilder.java
+++ b/unknow-server-maven/src/main/java/unknow/server/maven/jaxrs/MediaTypesBuilder.java
@@ -1,9 +1,7 @@
 package unknow.server.maven.jaxrs;
 
-import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
 import java.util.StringJoiner;
 
@@ -27,6 +25,7 @@
 
 /**
  * Build MediaTypes class with added MTPredicate and MediaType
+ * 
  * @author unknow
  */
 public class MediaTypesBuilder {
@@ -71,6 +70,7 @@ public MediaTypesBuilder(CompilationUnit cu, Map<String, String> existingClass)
 
 	/**
 	 * write the MediaTypes class if needed
+	 * 
 	 * @param writer writer to write to
 	 * @throws MojoExecutionException in case od error
 	 */
@@ -81,6 +81,7 @@ public void save(CompilationUnitWriter writer) throws MojoExecutionException {
 
 	/**
 	 * get an exception to an MediaType
+	 * 
 	 * @param f factory to add the required import
 	 * @param t mediaType
 	 * @return the exception
@@ -106,6 +107,7 @@ public Expression type(TypeFactory f, String t) {
 
 	/**
 	 * get an exception to an MTPredicate
+	 * 
 	 * @param f factory to add the required import
 	 * @param mediaTypes types accepted by the predicate
 	 * @return the exception
@@ -113,10 +115,8 @@ public Expression type(TypeFactory f, String t) {
 	public Expression predicate(TypeFactory f, Collection<String> mediaTypes) {
 		String k = "";
 		if (!mediaTypes.contains("*/*")) {
-			List<String> l = new ArrayList<>(mediaTypes);
-			l.sort(null);
 			StringJoiner s = new StringJoiner(",");
-			for (String str : l)
+			for (String str : mediaTypes)
 				s.add(str);
 			k = s.toString();
 		}