--- a/components/variations/proto/study.proto
+++ b/components/variations/proto/study.proto
@@ -264,6 +264,9 @@
     // A Mac-only value, indicating an x86-64 binary running on an arm64 host
     // via "Rosetta 2" binary translation.
     TRANSLATED_X86_64 = 4;
+
+    // A POSIX-only value, indicating an OpenPOWER host
+    PPC64 = 5;
   }
 
   // Enum to pass as optional bool.
--- a/components/variations/service/variations_field_trial_creator_base.cc
+++ b/components/variations/service/variations_field_trial_creator_base.cc
@@ -109,6 +109,9 @@
   if (process_arch == "x86") {
     return Study::X86_32;
   }
+  if (process_arch == "PPC_64") {
+    return Study::PPC64;
+  }
   if (process_arch == "x86_64") {
     std::string os_arch = base::SysInfo::OperatingSystemArchitecture();
     if (base::StartsWith(os_arch, "arm",