diff --git a/src/Learning/KWTest/CreateLargeFiles.cpp b/src/Learning/KWTest/CreateLargeFiles.cpp
index 83faf2bd8..7a3efed0a 100644
--- a/src/Learning/KWTest/CreateLargeFiles.cpp
+++ b/src/Learning/KWTest/CreateLargeFiles.cpp
@@ -12,7 +12,7 @@ boolean MovePositionInBinaryFile(FILE* fFile, longint lOffset)
 #if defined __MSC__
 	_fseeki64(fFile, lOffset, SEEK_CUR);
 #elif defined(__APPLE__)
-	fseeko(fFile, lOffset, nWhence);
+	fseeko(fFile, lOffset, SEEK_CUR);
 #else
 	fseeko64(fFile, lOffset, SEEK_CUR);
 #endif