diff --git a/betree/haura-benchmarks/haura-plots/haura_plots/__init__.py b/betree/haura-benchmarks/haura-plots/haura_plots/__init__.py
index ad794b45..4fcac1f3 100755
--- a/betree/haura-benchmarks/haura-plots/haura_plots/__init__.py
+++ b/betree/haura-benchmarks/haura-plots/haura_plots/__init__.py
@@ -223,13 +223,15 @@ def plot_evaluation_latency(path, variant):
         size = reads['size'].to_numpy()
         latency = reads['latency_ns'].to_numpy()
         p = np.polynomial.Polynomial.fit(size, latency, 1)
-        ax.plot(np.sort(size), p(np.sort(size)), linestyle=':', label='read trend', color='black')
+        size.sort()
+        ax.plot(size, p(size), linestyle=':', label='read trend', color='black')
     if len(writes) > 0:
         ax.scatter(writes['size'], writes['latency_ns'], marker='.', label="write")
         size = writes['size'].to_numpy()
         latency = writes['latency_ns'].to_numpy()
         p = np.polynomial.Polynomial.fit(size, latency, 1)
-        ax.plot(np.sort(size), p(np.sort(size)), linestyle='-.', label='write trend', color='black')
+        size.sort()
+        ax.plot(size, p(size), linestyle='-.', label='write trend', color='black')
     xticks = np.arange(0, 12 * 1024 * 1024 + 1, 2 * 1024 * 1024)
     ax.set_xticks(xticks, [int(x / 1024) for x in xticks])
     ax.set_xlabel("Size in KiB")