diff --git a/libc/libc.x86.map b/libc/libc.x86.map
index d594a9a..9a38ee9 100644
--- a/libc/libc.x86.map
+++ b/libc/libc.x86.map
@@ -1266,6 +1266,7 @@
     sigpause;
     sigrelse;
     sigset;
+    sync_file_range;
 } LIBC_N;
 
 LIBC_PRIVATE {