diff --git a/src/geoloop/bin/Plotmain.py b/src/geoloop/bin/Plotmain.py
index e6bc013c74a266da12bafd8c641b5f5cc171b779..6e5b749cc4971a89b89da7a446148ac36d151117 100644
--- a/src/geoloop/bin/Plotmain.py
+++ b/src/geoloop/bin/Plotmain.py
@@ -86,7 +86,9 @@ def main_plotmain(config_path: str | Path) -> None:
 
                     if config.plot_borehole_temp:
                         run_name = plotinput.run_names[i]
-                        runjson = run_name + ".json"
+                        runjson = config.config_file_path.parent / (
+                            run_name + ".json"
+                        )
                         keysneeded = []
                         keysoptional = [
                             "litho_k_param",