diff --git a/src/eLog.erl b/src/eLog.erl
index c17051a..4ef924e 100644
--- a/src/eLog.erl
+++ b/src/eLog.erl
@@ -495,9 +495,9 @@ add_trace_to_loglevel_config(Trace, Sink) ->
 %% arguments. The caller is NOT crashed.
 
 unsafeFormat(Fmt, Args) ->
-   try io_lib:format(Fmt, Args)
+   try eFmt:formatBin(Fmt, Args)
    catch
-      _:_ -> io_lib:format("FORMAT ERROR SAFE: ~p ~p", [Fmt, Args])
+      _:_ -> eFmt:formatBin(<<"FORMAT ERROR SAFE: ~p ~p">>, [Fmt, Args])
    end.
 
 safeFormat(Fmt, Args, Limit) ->