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-rw-r--r--src/sp-shape.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/sp-shape.h b/src/sp-shape.h
index 980bae934..806615606 100644
--- a/src/sp-shape.h
+++ b/src/sp-shape.h
@@ -23,7 +23,7 @@
#include <sigc++/connection.h>
#define SP_SHAPE(obj) ((SPShape*)obj)
-#define SP_IS_SHAPE(obj) (dynamic_cast<const SPShape*>((SPObject*)obj))
+#define SP_IS_SHAPE(obj) (dynamic_cast<const SPShape*>((SPObject*)obj) != NULL)
#define SP_SHAPE_WRITE_PATH (1 << 2)