diff --git a/libc/libc.x86.map b/libc/libc.x86.map
index 56d6609..11fb710 100644
--- a/libc/libc.x86.map
+++ b/libc/libc.x86.map
@@ -624,6 +624,7 @@
     madvise;
     mallinfo;
     malloc;
+    malloc_backtrace;
     malloc_disable;
     malloc_enable;
     malloc_iterate;