diff --git a/libc/libc.arm.brillo.map b/libc/libc.arm.brillo.map
index f81adca..2a1c2de 100644
--- a/libc/libc.arm.brillo.map
+++ b/libc/libc.arm.brillo.map
@@ -62,7 +62,7 @@
     __isnormal;
     __isnormalf;
     __isnormall;
-    __isthreaded;
+    __isthreaded; # arm x86 mips
     __libc_current_sigrtmax;
     __libc_current_sigrtmin;
     __libc_init;
diff --git a/libc/libc.arm.map b/libc/libc.arm.map
index 45d7539..02dd58c 100644
--- a/libc/libc.arm.map
+++ b/libc/libc.arm.map
@@ -62,7 +62,7 @@
     __isnormal;
     __isnormalf;
     __isnormall;
-    __isthreaded;
+    __isthreaded; # arm x86 mips
     __libc_current_sigrtmax;
     __libc_current_sigrtmin;
     __libc_init;
diff --git a/libc/libc.arm64.map b/libc/libc.arm64.map
index 37c475f..0f5f1e8 100644
--- a/libc/libc.arm64.map
+++ b/libc/libc.arm64.map
@@ -47,7 +47,6 @@
     __isnormal;
     __isnormalf;
     __isnormall;
-    __isthreaded;
     __libc_current_sigrtmax;
     __libc_current_sigrtmin;
     __libc_init;
diff --git a/libc/libc.map.txt b/libc/libc.map.txt
index 3179049..71c16d9 100644
--- a/libc/libc.map.txt
+++ b/libc/libc.map.txt
@@ -62,7 +62,7 @@
     __isnormal;
     __isnormalf;
     __isnormall;
-    __isthreaded;
+    __isthreaded; # arm x86 mips
     __libc_current_sigrtmax;
     __libc_current_sigrtmin;
     __libc_init;
diff --git a/libc/libc.mips.brillo.map b/libc/libc.mips.brillo.map
index 734f686..4ee0f3f 100644
--- a/libc/libc.mips.brillo.map
+++ b/libc/libc.mips.brillo.map
@@ -59,7 +59,7 @@
     __isnormal;
     __isnormalf;
     __isnormall;
-    __isthreaded;
+    __isthreaded; # arm x86 mips
     __libc_current_sigrtmax;
     __libc_current_sigrtmin;
     __libc_init;
diff --git a/libc/libc.mips.map b/libc/libc.mips.map
index 86a2a59..ca3a514 100644
--- a/libc/libc.mips.map
+++ b/libc/libc.mips.map
@@ -59,7 +59,7 @@
     __isnormal;
     __isnormalf;
     __isnormall;
-    __isthreaded;
+    __isthreaded; # arm x86 mips
     __libc_current_sigrtmax;
     __libc_current_sigrtmin;
     __libc_init;
diff --git a/libc/libc.mips64.map b/libc/libc.mips64.map
index 37c475f..0f5f1e8 100644
--- a/libc/libc.mips64.map
+++ b/libc/libc.mips64.map
@@ -47,7 +47,6 @@
     __isnormal;
     __isnormalf;
     __isnormall;
-    __isthreaded;
     __libc_current_sigrtmax;
     __libc_current_sigrtmin;
     __libc_init;
diff --git a/libc/libc.x86.brillo.map b/libc/libc.x86.brillo.map
index ceaa07d..a154689 100644
--- a/libc/libc.x86.brillo.map
+++ b/libc/libc.x86.brillo.map
@@ -59,7 +59,7 @@
     __isnormal;
     __isnormalf;
     __isnormall;
-    __isthreaded;
+    __isthreaded; # arm x86 mips
     __libc_current_sigrtmax;
     __libc_current_sigrtmin;
     __libc_init;
diff --git a/libc/libc.x86.map b/libc/libc.x86.map
index cc35757..b5c5fc7 100644
--- a/libc/libc.x86.map
+++ b/libc/libc.x86.map
@@ -59,7 +59,7 @@
     __isnormal;
     __isnormalf;
     __isnormall;
-    __isthreaded;
+    __isthreaded; # arm x86 mips
     __libc_current_sigrtmax;
     __libc_current_sigrtmin;
     __libc_init;
diff --git a/libc/libc.x86_64.map b/libc/libc.x86_64.map
index 37c475f..0f5f1e8 100644
--- a/libc/libc.x86_64.map
+++ b/libc/libc.x86_64.map
@@ -47,7 +47,6 @@
     __isnormal;
     __isnormalf;
     __isnormall;
-    __isthreaded;
     __libc_current_sigrtmax;
     __libc_current_sigrtmin;
     __libc_init;