diff --git a/mozilla/nsprpub/pr/include/md/_openbsd.h b/mozilla/nsprpub/pr/include/md/_openbsd.h
index 8719fe7802b..8dd44099f7d 100644
--- a/mozilla/nsprpub/pr/include/md/_openbsd.h
+++ b/mozilla/nsprpub/pr/include/md/_openbsd.h
@@ -69,7 +69,7 @@
 #define HAVE_DLL
 #define USE_DLFCN
 #define _PR_HAVE_SOCKADDR_LEN
-#define _PR_NO_LARGE_FILES
+#define _PR_HAVE_LARGE_OFF_T
 #define _PR_STAT_HAS_ST_ATIMESPEC
 #define _PR_POLL_AVAILABLE
 #define _PR_USE_POLL