diff --git a/libm/libm.arm.map b/libm/libm.arm.map
index 7e3175d..bee08d4 100644
--- a/libm/libm.arm.map
+++ b/libm/libm.arm.map
@@ -272,7 +272,7 @@
     *;
 };
 
-LIBC_O {
+LIBC_O { # introduced=O
   global:
     cacoshl;
     cacosl;
diff --git a/libm/libm.arm64.map b/libm/libm.arm64.map
index 3e259dd..550c39b 100644
--- a/libm/libm.arm64.map
+++ b/libm/libm.arm64.map
@@ -272,7 +272,7 @@
     *;
 };
 
-LIBC_O {
+LIBC_O { # introduced=O
   global:
     cacoshl;
     cacosl;
diff --git a/libm/libm.mips.map b/libm/libm.mips.map
index b368d41..0b6dc02 100644
--- a/libm/libm.mips.map
+++ b/libm/libm.mips.map
@@ -272,7 +272,7 @@
     *;
 };
 
-LIBC_O {
+LIBC_O { # introduced=O
   global:
     cacoshl;
     cacosl;
diff --git a/libm/libm.mips64.map b/libm/libm.mips64.map
index 3e259dd..550c39b 100644
--- a/libm/libm.mips64.map
+++ b/libm/libm.mips64.map
@@ -272,7 +272,7 @@
     *;
 };
 
-LIBC_O {
+LIBC_O { # introduced=O
   global:
     cacoshl;
     cacosl;
diff --git a/libm/libm.x86.map b/libm/libm.x86.map
index 3e259dd..550c39b 100644
--- a/libm/libm.x86.map
+++ b/libm/libm.x86.map
@@ -272,7 +272,7 @@
     *;
 };
 
-LIBC_O {
+LIBC_O { # introduced=O
   global:
     cacoshl;
     cacosl;
diff --git a/libm/libm.x86_64.map b/libm/libm.x86_64.map
index 3e259dd..550c39b 100644
--- a/libm/libm.x86_64.map
+++ b/libm/libm.x86_64.map
@@ -272,7 +272,7 @@
     *;
 };
 
-LIBC_O {
+LIBC_O { # introduced=O
   global:
     cacoshl;
     cacosl;