diff --git a/src/base.jl b/src/base.jl
index 1d8c77a..67b6cdb 100644
--- a/src/base.jl
+++ b/src/base.jl
@@ -1,4 +1,4 @@
-function log_evaluation(logger, performance_evaluation)
+function log_evaluation(logger::Logger, performance_evaluation)
     experiment = getorcreateexperiment(logger.service, logger.experiment_name;
         artifact_location=logger.artifact_location)
     run = createrun(logger.service, experiment;
diff --git a/src/types.jl b/src/types.jl
index ed8bbcc..6a2f9d4 100644
--- a/src/types.jl
+++ b/src/types.jl
@@ -34,7 +34,8 @@ function Logger(baseuri; experiment_name="MLJ experiment",
     service = MLFlow(baseuri)
 
     if ~healthcheck(service)
-        error("It seems that the MLFlow server is not running. For more information, see https://mlflow.org/docs/latest/quickstart.html")
+        error("It seems that the MLFlow server is not running at specified "*
+        "location, $baseuri. For more information, see https://mlflow.org/docs/latest/quickstart.html")
     end
     Logger(service, verbosity, experiment_name, artifact_location)
 end