diff --git a/src/Compiler/Driver/fsc.fs b/src/Compiler/Driver/fsc.fs
index ca3b669a532..9f8e3b1d875 100644
--- a/src/Compiler/Driver/fsc.fs
+++ b/src/Compiler/Driver/fsc.fs
@@ -77,7 +77,7 @@ type DiagnosticsLoggerUpToMaxErrors(tcConfigB: TcConfigBuilder, exiter: Exiter,
     override x.DiagnosticSink(diagnostic, severity) =
         let tcConfig = TcConfig.Create(tcConfigB, validate = false)
 
-        match diagnostic.AdjustSeverity(tcConfigB.diagnosticsOptions, severity) with
+        match diagnostic.AdjustSeverity(tcConfig.diagnosticsOptions, severity) with
         | FSharpDiagnosticSeverity.Error ->
             if errors >= tcConfig.maxErrors then
                 x.HandleTooManyErrors(FSComp.SR.fscTooManyErrors ())