diff --git a/src/hb-ot-color-sbix-table.hh b/src/hb-ot-color-sbix-table.hh
index 9ec44d70c..726356a59 100644
--- a/src/hb-ot-color-sbix-table.hh
+++ b/src/hb-ot-color-sbix-table.hh
@@ -301,7 +301,7 @@ struct sbix
       extents->x_bearing = x_offset;
       extents->y_bearing = png.IHDR.height + y_offset;
       extents->width     = png.IHDR.width;
-      extents->height    = -static_cast<int>(png.IHDR.height);
+      extents->height    = -1 * png.IHDR.height;
 
       /* Convert to font units. */
       if (strike_ppem)
diff --git a/test/fuzzing/fonts/clusterfuzz-testcase-minimized-hb_shape_fuzzer-5633785895911424 b/test/fuzzing/fonts/clusterfuzz-testcase-minimized-hb_shape_fuzzer-5633785895911424
new file mode 100644
index 000000000..0bbeb5c90
Binary files /dev/null and b/test/fuzzing/fonts/clusterfuzz-testcase-minimized-hb_shape_fuzzer-5633785895911424 differ