diff --git a/sys/fs/fat/fat.c b/sys/fs/fat/fat.c
index 7adc4ff..8ce38e4 100644
--- a/sys/fs/fat/fat.c
+++ b/sys/fs/fat/fat.c
@@ -102,7 +102,7 @@
   }
 
   //kprintf("[Offset(%s): %ld:%ld]", _file->filename, offset, size);
-  if (fl_fseek(_file, offset, 0) != 0)
+  if (fl_fseek(_file, offset & 0xFFFFFFFF, 0) != 0)
     kprintf("SEEK FAILED!");
 
   size = fl_fread(data, size, 1, _file);