diff --git a/src/base/allocator/partition_allocator/partition_alloc.gni b/src/base/allocator/partition_allocator/partition_alloc.gni
index ef77a8a705..3a47de99c9 100644
--- a/src/base/allocator/partition_allocator/partition_alloc.gni
+++ b/src/base/allocator/partition_allocator/partition_alloc.gni
@@ -38,8 +38,13 @@ if (is_nacl) {
 # TODO(crbug.com/329199197): Clean this up when experiments are complete.
 use_large_empty_slot_span_ring = true
 
+# 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,