diff --git a/lldb/source/Symbol/LocateSymbolFileMacOSX.cpp b/lldb/source/Symbol/LocateSymbolFileMacOSX.cpp
--- a/lldb/source/Symbol/LocateSymbolFileMacOSX.cpp
+++ b/lldb/source/Symbol/LocateSymbolFileMacOSX.cpp
@@ -342,13 +342,6 @@
       }
     }
 
-    cf_str = (CFStringRef)CFDictionaryGetValue((CFDictionaryRef)uuid_dict,
-                                               CFSTR("DBGArchitecture"));
-    if (cf_str && CFGetTypeID(cf_str) == CFStringGetTypeID()) {
-      if (CFCString::FileSystemRepresentation(cf_str, str))
-        module_spec.GetArchitecture().SetTriple(str.c_str());
-    }
-
     std::string DBGBuildSourcePath;
     std::string DBGSourcePath;
 
diff --git a/lldb/test/API/macosx/lc-note/firmware-corefile/TestFirmwareCorefiles.py b/lldb/test/API/macosx/lc-note/firmware-corefile/TestFirmwareCorefiles.py
--- a/lldb/test/API/macosx/lc-note/firmware-corefile/TestFirmwareCorefiles.py
+++ b/lldb/test/API/macosx/lc-note/firmware-corefile/TestFirmwareCorefiles.py
@@ -85,7 +85,7 @@
                 'fi',
                 'echo "<dict><key>$uuid</key><dict>"',
                 '',
-                'echo "<key>DBGArchitecture</key><string>x86_64</string>"',
+                'echo "<key>DBGArchitecture</key><string>i386</string>"',
                 'echo "<key>DBGDSYMPath</key><string>$dsym</string>"',
                 'echo "<key>DBGSymbolRichExecutable</key><string>$bin</string>"',
                 'echo "</dict></dict></plist>"',