diff --git a/libm/libm.map.txt b/libm/libm.map.txt
index a931b93..f1732f8 100644
--- a/libm/libm.map.txt
+++ b/libm/libm.map.txt
@@ -271,7 +271,7 @@
     *;
 };
 
-LIBC_O { # introduced=O
+LIBC_O { # introduced=26
   global:
     cacoshl;
     cacosl;