diff --git a/process/io/plot_radial_build.py b/process/io/plot_radial_build.py
index 1e6f017830..2c0733e128 100644
--- a/process/io/plot_radial_build.py
+++ b/process/io/plot_radial_build.py
@@ -460,7 +460,7 @@ def main(args=None):
     plt.xlabel("Radius [m]")
     plt.tight_layout()
     plt.savefig(
-        f"{args.outputdir}/{args.input[:-10]}_radial_build.{save_format}",
+        f"{args.outputdir}/{Path(args.input).stem}_radial_build.{save_format}",
         bbox_inches="tight",
     )