diff --git a/src/export/ExportPCM.cpp b/src/export/ExportPCM.cpp
index d4a1f8284..4c1a1008c 100644
--- a/src/export/ExportPCM.cpp
+++ b/src/export/ExportPCM.cpp
@@ -490,7 +490,7 @@ int ExportPCM::Export(AudacityProject *project,
                                                   formatStr.c_str()));
 
          while (updateResult == eProgressSuccess) {
-            sampleCount samplesWritten;
+            sf_count_t samplesWritten;
             sampleCount numSamples = mixer->Process(maxBlockLen);
 
             if (numSamples == 0)