diff --git a/lib/file.cpp b/lib/file.cpp
index 495c08c..00c215b 100644
--- a/lib/file.cpp
+++ b/lib/file.cpp
@@ -106,6 +106,7 @@ void File::seek(File::pos_t p, SeekMode s)
 
   DWORD m;
   switch (s) {
+  default:
   case SeekStart:
     m = FILE_BEGIN;
     break;