diff --git a/elements/gstqtvideosink/gstqtvideosinkplugin.h b/elements/gstqtvideosink/gstqtvideosinkplugin.h
index dc04671..7b1ceab 100644
--- a/elements/gstqtvideosink/gstqtvideosinkplugin.h
+++ b/elements/gstqtvideosink/gstqtvideosinkplugin.h
@@ -28,7 +28,7 @@ GST_DEBUG_CATEGORY_EXTERN(gst_qt_video_sink_debug);
     GType cpp_type::get_type() \
     { \
         static volatile gsize gonce_data = 0; \
-        if (g_once_init_enter(&gonce_data)) { \
+        if (g_once_init_enter((unsigned long *)&gonce_data)) { \
             GType type = 0; \
             GTypeInfo info; \
             info.class_size = sizeof(cpp_type##Class); \
diff --git a/src/QGlib/value.cpp b/src/QGlib/value.cpp
index 932ffad..226a259 100644
--- a/src/QGlib/value.cpp
+++ b/src/QGlib/value.cpp
@@ -57,7 +57,7 @@ Dispatcher::Dispatcher()
     }; \
     setVTable(GTYPE, ValueVTable(ValueVTable_##NICK::set, ValueVTable_##NICK::get));
 
-    DECLARE_VTABLE(char, char, Type::Char)
+    DECLARE_VTABLE(char, schar, Type::Char)
     DECLARE_VTABLE(unsigned char, uchar, Type::Uchar)
     DECLARE_VTABLE(bool, boolean, Type::Boolean)
     DECLARE_VTABLE(int, int, Type::Int)