diff --git a/compat/mingw.h b/compat/mingw.h
index 8898006278..bfdfdb4940 100644
--- a/compat/mingw.h
+++ b/compat/mingw.h
@@ -117,6 +117,9 @@ static inline int waitpid(pid_t pid, int *status, unsigned options)
 	return -1;
 }
 
+#define off_t off64_t
+#define lseek lseek64
+
 /*
  * implementations of missing functions
  */