diff --git a/libc/libc.arm.map b/libc/libc.arm.map
index f9c5ede..3ff7ead 100644
--- a/libc/libc.arm.map
+++ b/libc/libc.arm.map
@@ -186,19 +186,16 @@
     __sym_ntos;
     __sym_ston;
     __system_properties_init;
-    __system_property_add; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_area__; # var
     __system_property_area_init; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_area_serial; # introduced=23
     __system_property_find;
-    __system_property_find_nth;
     __system_property_foreach; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_get;
     __system_property_read;
     __system_property_serial; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_set; # introduced-arm=12 introduced-arm64=21 introduced-mips=12 introduced-mips64=21 introduced-x86=12 introduced-x86_64=21
     __system_property_set_filename; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
-    __system_property_update; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_wait_any; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __timer_create; # arm x86 mips
     __timer_delete; # arm x86 mips
@@ -1535,8 +1532,15 @@
     wcswcs; # arm x86 mips
 } LIBC_O;
 
+LIBC_DEPRECATED {
+  global:
+    __system_property_find_nth;
+};
+
 LIBC_PLATFORM {
   global:
+    __system_property_add;
+    __system_property_update;
     android_net_res_stats_get_info_for_net;
     android_net_res_stats_aggregate;
     android_net_res_stats_get_usable_servers;