diff --git a/src/otp/Logger.fs b/src/otp/Logger.fs
index eb09c30..113f229 100644
--- a/src/otp/Logger.fs
+++ b/src/otp/Logger.fs
@@ -41,8 +41,8 @@ type IExports =
     abstract debug: msg: string -> unit
     /// Log a debug message with metadata or format args.
     abstract debug: msg: string * metadataOrArgs: obj -> unit
-    /// Set the primary logger configuration. Common use: set_primary_config("level", atom)
-    abstract set_primary_config: key: string * value: Atom -> unit
+    /// Set the primary logger configuration. Common use: set_primary_config(atom "level", atom "debug")
+    abstract set_primary_config: key: Atom * value: Atom -> unit
     /// Add a primary filter. Filters run before handler filters and can stop or modify events.
     /// The filter is a tuple {FilterFun, Extra} where FilterFun is fun(LogEvent, Extra) -> stop | ignore | LogEvent.
     abstract add_primary_filter: id: Atom * filter: (System.Func<obj, obj, obj> * obj) -> unit