diff --git a/rules/solve_myopic.smk b/rules/solve_myopic.smk
index 217547b9..afa8ad2c 100644
--- a/rules/solve_myopic.smk
+++ b/rules/solve_myopic.smk
@@ -89,7 +89,7 @@ rule solve_sector_network_myopic:
             "co2_sequestration_potential", 200
         ),
         custom_extra_functionality=workflow.source_path(
-            config["solver"]["options"].get("custom_extra_functionality", "")
+            config["solving"]["options"].get("custom_extra_functionality", "")
         ),
     input:
         network=RESULTS
diff --git a/rules/solve_overnight.smk b/rules/solve_overnight.smk
index 8ac56db8..fc2f74df 100644
--- a/rules/solve_overnight.smk
+++ b/rules/solve_overnight.smk
@@ -12,7 +12,7 @@ rule solve_sector_network:
             "co2_sequestration_potential", 200
         ),
         custom_extra_functionality=workflow.source_path(
-            config["solver"]["options"].get("custom_extra_functionality", "")
+            config["solving"]["options"].get("custom_extra_functionality", "")
         ),
     input:
         network=RESULTS
diff --git a/rules/solve_perfect.smk b/rules/solve_perfect.smk
index 322ced8d..63be5cc1 100644
--- a/rules/solve_perfect.smk
+++ b/rules/solve_perfect.smk
@@ -119,7 +119,7 @@ rule solve_sector_network_perfect:
             "co2_sequestration_potential", 200
         ),
         custom_extra_functionality=workflow.source_path(
-            config["solver"]["options"].get("custom_extra_functionality", "")
+            config["solving"]["options"].get("custom_extra_functionality", "")
         ),
     input:
         network=RESULTS