diff --git a/plugins/osgdb_tms/ReaderWriterTMS.cpp b/plugins/osgdb_tms/ReaderWriterTMS.cpp
index f9ba5be12f130c6f7f3b57ece222805fe558594e..810a23eb68510219bd5cbcffca95012263ce0484 100644
--- a/plugins/osgdb_tms/ReaderWriterTMS.cpp
+++ b/plugins/osgdb_tms/ReaderWriterTMS.cpp
@@ -73,6 +73,7 @@ public:
         supportsOption("MaximumLevel", "Set maximum level (Z) to load: default 0 (infinite)");
         supportsOption("TileSkirtRatio", "Create skirts for every tile: default 0.02");
         supportsOption("TileElevationScale", "Set elevation scale for every tile: default 1.0");
+        osgDB::Registry::instance()->getReaderWriterForExtension("verse_web");
     }
 
     virtual const char* className() const
diff --git a/plugins/osgdb_web/ReaderWriterWeb.cpp b/plugins/osgdb_web/ReaderWriterWeb.cpp
index 83a264dc0ad1a00d4e9b4d57165ef6ee29c96cbd..903c1ca58559e44f76250bbc7e421bb2b7ff6857 100644
--- a/plugins/osgdb_web/ReaderWriterWeb.cpp
+++ b/plugins/osgdb_web/ReaderWriterWeb.cpp
@@ -54,7 +54,9 @@ public:
         supportsExtension("verse_web", "Pseudo file extension, used to select libhv plugin.");
         supportsExtension("*", "Passes all read files to other plugins to handle actual model loading.");
         supportsOption("Extension", "Set another pseudo extension for loaded file");
-        supportsOption("RequestHeaders", "Set request header list (key1;value1;key2;value2;...) as a string");
+        supportsOption("RequestHeaders", "Set request header list (key1;value1;key2;value2;...) as a string");
+
+        osgDB::Registry::instance()->addFileExtensionAlias("webp","verse_webp");
     }
 
     virtual ~ReaderWriterWeb()
diff --git a/plugins/osgdb_webp/ReaderWriterWebP.cpp b/plugins/osgdb_webp/ReaderWriterWebP.cpp
index 1164f1d97b1c0695174c49951197a76c4729d90f..e2495735832dfa526165eda4c5f7f1d1bfa8735d 100644
--- a/plugins/osgdb_webp/ReaderWriterWebP.cpp
+++ b/plugins/osgdb_webp/ReaderWriterWebP.cpp
@@ -48,7 +48,9 @@ public:
         image->allocateImage(width, height, 1, GL_RGBA, GL_UNSIGNED_BYTE);
         image->setInternalTextureFormat(GL_RGBA8);
         memcpy(image->data(), rgba, image->getTotalSizeInBytes());
-        WebPFree(rgba); return image.get();
+        WebPFree(rgba);
+        image->flipVertical();
+        return image.get();
     }
 
     virtual WriteResult writeImage(const osg::Image& image, const std::string& path,
@@ -57,7 +59,9 @@ public:
         std::string ext; std::string fileName = getRealFileName(path, ext);
         std::ofstream out(fileName, std::ios::out | std::ios::binary);
         if (!out) return WriteResult::ERROR_IN_WRITING_FILE;
-        return writeImage(image, out, options);
+        osg::ref_ptr<osg::Image> tmp_img = new osg::Image(image);
+        tmp_img->flipVertical();
+        return writeImage(*tmp_img, out, options);
     }
 
     virtual WriteResult writeImage(const osg::Image& image, std::ostream& out,
diff --git a/readerwriter/MimeTypes.cpp b/readerwriter/MimeTypes.cpp
index 0a65370b5439eba1da3b8bcf7c4b551f70555ee1..107d01b180c8b69bdb796489278b153330b86559 100644
--- a/readerwriter/MimeTypes.cpp
+++ b/readerwriter/MimeTypes.cpp
@@ -41,6 +41,7 @@ const char* osgv_builtinMimeTypeExtMappings[] =
     "image/pjpeg","jpg",
     "image/png","png",
     "image/tiff","tif",
+    "image/webp","webp",
     "image/vasa","mcf",
     "image/vnd.dwg","dxf",
     "image/vnd.fpx","fpx",