diff --git a/app/display/gimpdisplayshell-tool-events.c b/app/display/gimpdisplayshell-tool-events.c
index 7ff3b65394..c595640996 100644
--- a/app/display/gimpdisplayshell-tool-events.c
+++ b/app/display/gimpdisplayshell-tool-events.c
@@ -2005,7 +2005,7 @@ gimp_display_shell_rotate_gesture_maybe_get_state (GtkGestureRotate *gesture,
    * last_event happens to not have it. Thus we store the last valid state
    * and only update it if we get a valid state from last_event.
    */
-  guint           state = 0;
+  GdkModifierType state = 0;
   const GdkEvent *last_event;
 
   last_event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence);
diff --git a/app/widgets/gimpcontainertreeview-dnd.c b/app/widgets/gimpcontainertreeview-dnd.c
index 342012b01b..060075d7fc 100644
--- a/app/widgets/gimpcontainertreeview-dnd.c
+++ b/app/widgets/gimpcontainertreeview-dnd.c
@@ -163,7 +163,7 @@ gimp_container_tree_view_drop_status (GimpContainerTreeView    *tree_view,
   target_list = gtk_drag_dest_get_target_list (GTK_WIDGET (tree_view->view));
   target_atom = gtk_drag_dest_find_target (GTK_WIDGET (tree_view->view),
                                            context, target_list);
-  if (! gtk_target_list_find (target_list, target_atom, &src_type))
+  if (! gtk_target_list_find (target_list, target_atom, (guint *) &src_type))
     goto drop_impossible;
 
   switch (src_type)
diff --git a/app/xcf/xcf-save.c b/app/xcf/xcf-save.c
index 62754ebdb7..2f5d1972d2 100644
--- a/app/xcf/xcf-save.c
+++ b/app/xcf/xcf-save.c
@@ -1865,7 +1865,7 @@ xcf_save_prop (XcfInfo    *info,
           g_return_val_if_reached (FALSE);
         xcf_write_int32_check_error (info, &item_type, 1, va_end (args));
 
-        if (! gimp_item_list_is_pattern (set, &method))
+        if (! gimp_item_list_is_pattern (set, (GimpSelectMethod *) &method))
           method = G_MAXUINT32;
         xcf_write_int32_check_error (info, &method, 1, va_end (args));
 
diff --git a/libgimp/gimpgpparams-body.c b/libgimp/gimpgpparams-body.c
index 3a3ee0f596..f1f204d91c 100644
--- a/libgimp/gimpgpparams-body.c
+++ b/libgimp/gimpgpparams-body.c
@@ -1805,8 +1805,8 @@ gimp_value_to_gp_param (const GValue *value,
           param->data.d_curve.n_points    = gimp_curve_get_n_points (curve);
           param->data.d_curve.points      = g_new0 (gdouble,
                                                     2 * param->data.d_curve.n_points);
-          param->data.d_curve.point_types = g_new0 (GimpCurvePointType,
-                                                    param->data.d_curve.n_points);
+          param->data.d_curve.point_types = (guint32 *) g_new0 (GimpCurvePointType,
+                                                                param->data.d_curve.n_points);
 
           for (gint j = 0; j < param->data.d_curve.n_points; j++)
             {
diff --git a/libgimpconfig/gimpconfigwriter.c b/libgimpconfig/gimpconfigwriter.c
index 5d96e1ad4f..e73b020654 100644
--- a/libgimpconfig/gimpconfigwriter.c
+++ b/libgimpconfig/gimpconfigwriter.c
@@ -254,7 +254,7 @@ gimp_config_writer_new_from_fd (gint fd)
   writer->ref_count = 1;
 
 #ifdef G_OS_WIN32
-  writer->output = g_win32_output_stream_new ((gpointer) fd, FALSE);
+  writer->output = g_win32_output_stream_new ((gpointer) (intptr_t) fd, FALSE);
 #else
   writer->output = g_unix_output_stream_new (fd, FALSE);
 #endif
diff --git a/modules/controller-dx-dinput.c b/modules/controller-dx-dinput.c
index 60ade55d0a..50214c847f 100644
--- a/modules/controller-dx-dinput.c
+++ b/modules/controller-dx-dinput.c
@@ -1042,7 +1042,7 @@ dx_dinput_setup_events (ControllerDXDInput *controller,
 
   controller->pollfd = g_new (GPollFD, 1);
 
-  controller->pollfd->fd = (int) controller->event;
+  controller->pollfd->fd = (int) (intptr_t) controller->event;
   controller->pollfd->events = G_IO_IN;
 
   g_source_add_poll (&source->source, controller->pollfd);