diff --git a/modules/quvi/backend.py b/modules/quvi/backend.py
index 7891296c..ecf868a2 100644
--- a/modules/quvi/backend.py
+++ b/modules/quvi/backend.py
@@ -103,6 +103,9 @@ class QuviVideo(BaseVideo):
         if _id.startswith('http'):
             return _id
 
+        if not '.' in _id:
+            raise UserError('Please give an ID in form WEBSITE.ID (for example youtube.BaW_jenozKc). Supported websites are: %s' % ', '.join(cls.BACKENDS.keys()))
+
         sub_backend, sub_id = _id.split('.', 1)
         try:
             return cls.BACKENDS[sub_backend] % sub_id
diff --git a/modules/quvi/quvi.py b/modules/quvi/quvi.py
index f7fbb4a0..27e1805f 100644
--- a/modules/quvi/quvi.py
+++ b/modules/quvi/quvi.py
@@ -64,7 +64,8 @@ class LibQuvi04(object):
         if self.lib is None:
             return False
 
-        version_str = c_char_p(self.lib.quvi_version(self.QUVI_VERSION)).value
+        self.lib.quvi_version.restype = c_char_p
+        version_str = self.lib.quvi_version(self.QUVI_VERSION)
         if version_str.startswith('v0.4'):
             return True
         else:
@@ -108,8 +109,9 @@ class LibQuvi04(object):
 
     def _assert_ok(self, status):
         if status != self.QUVI_OK:
-            c_msg = c_char_p(self.lib.quvi_strerror(self.qh, status))
-            raise QuviError(c_msg.value)
+            self.lib.quvi_strerror.restype = c_char_p
+            c_msg = self.lib.quvi_strerror(self.qh, status)
+            raise QuviError(c_msg)
 
     def _get_str(self, prop):
         c_value = c_char_p()