diff --git a/libc/libc.map.txt b/libc/libc.map.txt
index 35e67c8..ffd5d1e 100644
--- a/libc/libc.map.txt
+++ b/libc/libc.map.txt
@@ -953,6 +953,7 @@
     setvbuf;
     setxattr;
     shutdown;
+    sig2str; # introduced=36
     sigaction;
     sigaddset;
     sigaltstack;
@@ -995,6 +996,7 @@
     stdout; # var introduced=23
     stpcpy;
     stpncpy;
+    str2sig; # introduced=36
     strcasecmp;
     strcasecmp_l; # introduced=23
     strcasestr;