diff --git a/gwenview/lib/mimetypeutils.cpp b/gwenview/lib/mimetypeutils.cpp
index 3f238eb6..f1b9ca4b 100644
--- a/gwenview/lib/mimetypeutils.cpp
+++ b/gwenview/lib/mimetypeutils.cpp
@@ -62,12 +62,11 @@ QString urlMimeType(const KUrl& url)
     if (url.isEmpty()) {
         return "unknown";
     }
-    // Try a simple guess, using extension for remote urls
+    // Check for local files
     QString mimeType = KMimeType::findByUrl(url)->name();
-    if (mimeType == "application/octet-stream") {
+    if (mimeType == KMimeType::defaultMimeType()) {
         kDebug() << "KMimeType::findByUrl() failed to find mimetype for" << url << ". Falling back to KIO::stat().";
-        // No luck, look deeper. This can happens with http urls if the filename
-        // does not provide any extension.
+        // No luck, look deeper
         KIO::UDSEntry statentry;
         KIO::NetAccess::stat(url, statentry, KApplication::kApplication()->activeWindow());
         mimeType = statentry.stringValue(KIO::UDSEntry::UDS_MIME_TYPE);
diff --git a/okular/core/document.cpp b/okular/core/document.cpp
index 4d5b490b..2dda86aa 100644
--- a/okular/core/document.cpp
+++ b/okular/core/document.cpp
@@ -1982,7 +1982,7 @@ Document::OpenResult Document::openDocument( const QString & docFile, const KUrl
         qstdin.open( stdin, QIODevice::ReadOnly );
         filedata = qstdin.readAll();
         mime = KMimeType::findByContent( filedata );
-        if ( !mime || mime->name() == QLatin1String( "application/octet-stream" ) )
+        if ( !mime || mime->isDefault() )
             return OpenError;
         document_size = filedata.size();
         triedMimeFromFileContent = true;