diff --git a/plot_transmission_timeline.py b/plot_transmission_timeline.py
index e797247..8bb7a99 100755
--- a/plot_transmission_timeline.py
+++ b/plot_transmission_timeline.py
@@ -263,12 +263,13 @@ if __name__ == "__main__":
 
     # rtt cdf
     plt.clf()
+
     print(transmission_df["ack_rtt"])
     print("Calculate and polt rtt CDF...")
     plot_cdf(transmission_df, "ack_rtt")
     plt.xlabel("ACK RTT [s]")
     plt.ylabel("CDF")
-    plt.yscale("log")
+    plt.xscale("log")
     plt.legend([cc_algo])
     plt.title("{} with {}".format(transmission_direction, cc_algo))