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-rw-r--r--src/marker.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/marker.h b/src/marker.h
index 3da12af08..aae4e020f 100644
--- a/src/marker.h
+++ b/src/marker.h
@@ -19,7 +19,7 @@
*/
#define SP_TYPE_MARKER (sp_marker_get_type ())
-#define SP_MARKER(obj) ((SPMarker*)obj)
+#define SP_MARKER(obj) (dynamic_cast<SPMarker*>((SPObject*)obj))
#define SP_IS_MARKER(obj) (dynamic_cast<const SPMarker*>((SPObject*)obj) != NULL)
struct SPMarkerView;