diff --git a/goo/gfile.cc b/goo/gfile.cc
index 44beddd..05aefb8 100644
--- a/goo/gfile.cc
+++ b/goo/gfile.cc
@@ -608,7 +608,7 @@ int GooFile::read(char *buf, int n, Goffset offset) const {
   overlapped.Offset = largeInteger.LowPart;
   overlapped.OffsetHigh = largeInteger.HighPart;
 
-  return FALSE == ReadFile(handle, buf, n, &m, &overlapped) ? -1 : m;
+  return FALSE == ReadFile(handle, buf, n, &m, &overlapped) ? 0 : m;
 }
 
 Goffset GooFile::size() const {