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-rw-r--r--src/sp-mesh-patch.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/sp-mesh-patch.h b/src/sp-mesh-patch.h
index fe9f2d071..ddade6503 100644
--- a/src/sp-mesh-patch.h
+++ b/src/sp-mesh-patch.h
@@ -17,7 +17,7 @@
//#include "svg/svg-length.h"
#include "sp-object.h"
-#define SP_MESHPATCH(obj) ((SPMeshPatch*)obj)
+#define SP_MESHPATCH(obj) (dynamic_cast<SPMeshPatch*>((SPObject*)obj))
#define SP_IS_MESHPATCH(obj) (dynamic_cast<const SPMeshPatch*>((SPObject*)obj) != NULL)
/** Gradient MeshPatch. */