diff --git a/libc/libc.arm.map b/libc/libc.arm.map
index 3ff7ead..4319429 100644
--- a/libc/libc.arm.map
+++ b/libc/libc.arm.map
@@ -1265,6 +1265,7 @@
 
 LIBC_O {
   global:
+    __system_property_read_callback; # future
     bsd_signal; # arm x86 mips versioned=26
     catclose; # future
     catgets; # future