diff --git a/src/common/mac/arch_utilities.cc b/src/common/mac/arch_utilities.cc
index c0e4bac5..6d06e6bd 100644
--- a/src/common/mac/arch_utilities.cc
+++ b/src/common/mac/arch_utilities.cc
@@ -130,7 +130,10 @@ const NXArchInfo* BreakpadGetArchInfoFromCpuType(cpu_type_t cpu_type,
 
 }  // namespace google_breakpad
 
-#ifndef __APPLE__
+// TODO(crbug.com/1242776): The "#ifndef __APPLE__" should be here, but the
+// system version of NXGetLocalArchInfo returns incorrect information on
+// x86_64 machines (treating them as just x86), so use the Breakpad version
+// all the time for now.
 namespace {
 
 enum Architecture {
@@ -219,6 +222,8 @@ const NXArchInfo *NXGetLocalArchInfo(void) {
   return &kKnownArchitectures[arch];
 }
 
+#ifndef __APPLE__
+
 const NXArchInfo *NXGetArchInfoFromName(const char *name) {
   for (int arch = 0; arch < kNumArchitectures; ++arch) {
     if (!strcmp(name, kKnownArchitectures[arch].name)) {