diff --git a/src/base/allocator/partition_allocator/partition_alloc.gni b/src/base/allocator/partition_allocator/partition_alloc.gni
index 4f8d896b82..a24dde67fa 100644
--- a/src/base/allocator/partition_allocator/partition_alloc.gni
+++ b/src/base/allocator/partition_allocator/partition_alloc.gni
@@ -89,11 +89,11 @@ is_clang_or_gcc = is_clang || !is_win
 # A static_assert in partition_alloc_config.h verifies that.
 if (current_cpu == "x64" || current_cpu == "arm64" || current_cpu == "arm64e" ||
     current_cpu == "loong64" || current_cpu == "riscv64" ||
-    current_cpu == "ppc64" || current_cpu == "s390x") {
+    current_cpu == "ppc64" || current_cpu == "s390x" || current_cpu == "mips64el") {
   assert(current_cpu != "arm64e" || (is_ios && target_environment == "device"))
   has_64_bit_pointers = true
 } else if (current_cpu == "x86" || current_cpu == "arm" ||
-           current_cpu == "wasm") {
+           current_cpu == "wasm" || current_cpu == "mipsel") {
   has_64_bit_pointers = false
 } else {
   assert(false, "Unknown CPU: $current_cpu")