diff --git a/src/solver/model_getters.jl b/src/solver/model_getters.jl
index 03b1a01bd1..5789aad2bf 100644
--- a/src/solver/model_getters.jl
+++ b/src/solver/model_getters.jl
@@ -18,7 +18,7 @@ function get_model_config(parsed_args)
     if !(config ∈ valid_configurations)
         error_message = string(
             "config = $config is not one of the ",
-            "valid configurations $valid_configurations"
+            "valid configurations $valid_configurations",
         )
         throw(ArgumentError(error_message))
     end