diff --git a/src/backends/glvisualize.jl b/src/backends/glvisualize.jl
index f895df8b..b8a4ed04 100644
--- a/src/backends/glvisualize.jl
+++ b/src/backends/glvisualize.jl
@@ -290,7 +290,7 @@ function extract_points(d)
     array = if d[:seriestype] == :straightline
         straightline_data(d)
     elseif d[:seriestype] == :shape
-        shape_data(series)
+        shape_data(d)
     else
         (d[:x], d[:y], d[:z])[1:dim]
     end