--- libbtcore/diskio/cachefile.cpp
+++ libbtcore/diskio/cachefile.cpp
@@ -484,9 +484,13 @@ namespace bt
 			openFile(READ);
 			close_again = true;
 		}
-
+#ifdef HAVE_FSTAT64
+		struct stat64 sb;
+		if (fstat64(fd,&sb) == 0)
+#else
 		struct stat sb;
 		if (fstat(fd,&sb) == 0)
+#endif
 		{
 			ret = (Uint64)sb.st_blocks * 512;
 		}