diff --git a/src/trace_processor/importers/perf/record_parser.cc b/src/trace_processor/importers/perf/record_parser.cc
index 3d3bdcd879..a63a5bd110 100644
--- a/src/trace_processor/importers/perf/record_parser.cc
+++ b/src/trace_processor/importers/perf/record_parser.cc
@@ -73,14 +73,13 @@ CreateMappingParams BuildCreateMappingParams(
 
 bool IsInKernel(protos::pbzero::Profiling::CpuMode cpu_mode) {
   switch (cpu_mode) {
-    case protos::pbzero::Profiling::MODE_UNKNOWN:
-      PERFETTO_FATAL("Unknown CPU mode");
     case protos::pbzero::Profiling::MODE_GUEST_KERNEL:
     case protos::pbzero::Profiling::MODE_KERNEL:
       return true;
     case protos::pbzero::Profiling::MODE_USER:
     case protos::pbzero::Profiling::MODE_HYPERVISOR:
     case protos::pbzero::Profiling::MODE_GUEST_USER:
+    case protos::pbzero::Profiling::MODE_UNKNOWN:
       return false;
   }
   PERFETTO_FATAL("For GCC.");
@@ -161,6 +160,11 @@ base::Status RecordParser::InternSample(Sample sample) {
         "Can not parse samples with no PERF_SAMPLE_TID field");
   }
 
+  if (sample.cpu_mode ==
+      protos::pbzero::perfetto_pbzero_enum_Profiling::MODE_UNKNOWN) {
+    context_->storage->IncrementStats(stats::perf_samples_cpu_mode_unknown);
+  }
+
   UniqueTid utid = context_->process_tracker->UpdateThread(sample.pid_tid->tid,
                                                            sample.pid_tid->pid);
   const auto upid = *context_->storage->thread_table()
diff --git a/src/trace_processor/storage/stats.h b/src/trace_processor/storage/stats.h
index e4b06c81d3..a19e5be2d7 100644
--- a/src/trace_processor/storage/stats.h
+++ b/src/trace_processor/storage/stats.h
@@ -273,6 +273,7 @@ namespace stats {
   F(perf_samples_skipped,                 kSingle,  kError,    kAnalysis, ""), \
   F(perf_counter_skipped_because_no_cpu,  kSingle,  kError,    kAnalysis, ""), \
   F(perf_features_skipped,                kIndexed, kInfo,     kAnalysis, ""), \
+  F(perf_samples_cpu_mode_unknown,        kSingle,  kError,    kAnalysis, ""), \
   F(perf_samples_skipped_dataloss,        kSingle,  kDataLoss, kTrace,    ""), \
   F(perf_dummy_mapping_used,              kSingle,  kInfo,     kAnalysis, ""), \
   F(perf_invalid_event_id,                kSingle,  kError,    kTrace,    ""), \