diff --git a/libc/libc.arm.map b/libc/libc.arm.map
index 7500742..4654f99 100644
--- a/libc/libc.arm.map
+++ b/libc/libc.arm.map
@@ -1551,4 +1551,5 @@
     malloc_disable;
     malloc_enable;
     malloc_iterate;
+    mallopt;
 } LIBC_O;