diff --git a/src/backends/pgfplotsx.jl b/src/backends/pgfplotsx.jl
index 28479b1c8..8913f8738 100644
--- a/src/backends/pgfplotsx.jl
+++ b/src/backends/pgfplotsx.jl
@@ -266,8 +266,8 @@ function (pgfx_plot::PGFPlotsXPlot)(plt::Plot{PGFPlotsXBackend})
                 )
             end
             for (series_index, series) in enumerate(series_list(sp))
-                # give each series a uuid for fillbetween
-                series_id = uuid4()
+                # give each series an id for fillbetween
+                series_id = maximum(values(_pgfplotsx_series_ids), init = 0) + 1
                 _pgfplotsx_series_ids[Symbol("$series_index")] = series_id
                 opt = series.plotattributes
                 st = series[:seriestype]