diff --git a/src/base/allocator/partition_allocator/partition_alloc.gni b/src/base/allocator/partition_allocator/partition_alloc.gni
index 88b1d3826c..61e53dafc5 100644
--- a/src/base/allocator/partition_allocator/partition_alloc.gni
+++ b/src/base/allocator/partition_allocator/partition_alloc.gni
@@ -31,8 +31,13 @@ if (is_nacl) {
 # Increases the size of the empty slot span ring.
 use_large_empty_slot_span_ring = is_mac
 
+# Disables for Android ARM64 because it actually requires API 31+.
+# See partition_alloc/tagging.cc:
+# mallopt can be loaded after API 26.
+# mallopt M_BIONIC_SET_HEAP_TAGGING_LEVEL can be called after API 31.
+# Disables for OpenWrt Musl which lacks the required ifunc support.
 has_memory_tagging =
-    current_cpu == "arm64" && is_clang && !is_asan && (is_linux || is_android)
+    current_cpu == "arm64" && is_clang && !is_asan && is_linux && current_os != "openwrt"
 
 declare_args() {
   # Causes all the allocations to be routed via allocator_shim.cc. Usually,