diff --git a/repos/libports/lib/symbols/libc b/repos/libports/lib/symbols/libc
index 0bde0b6ea0..15f04724fa 100644
--- a/repos/libports/lib/symbols/libc
+++ b/repos/libports/lib/symbols/libc
@@ -481,6 +481,8 @@ nlist T
 nrand48 T
 offtime T
 open T
+open_memstream T
+open_wmemstream T
 openat T
 opendir T
 openlog T