diff --git a/src/tracing/internal/tracing_muxer_impl.cc b/src/tracing/internal/tracing_muxer_impl.cc
index 219b413..729bdb4 100644
--- a/src/tracing/internal/tracing_muxer_impl.cc
+++ b/src/tracing/internal/tracing_muxer_impl.cc
@@ -46,6 +46,7 @@
 #include "src/tracing/core/null_trace_writer.h"
 #include "src/tracing/internal/tracing_muxer_fake.h"
 
+#include "protos/perfetto/config/chrome/chrome_config.gen.h"
 #include "protos/perfetto/config/interceptor_config.gen.h"
 
 #if PERFETTO_BUILDFLAG(PERFETTO_OS_WIN)
@@ -144,6 +145,14 @@
   config.set_trace_duration_ms(0);
   config.set_stop_timeout_ms(0);
   config.set_enable_extra_guardrails(false);
+  // Clear client priority inside Chrome config, because Chrome always sets
+  // the priority to USER_INITIATED when setting up startup tracing.
+  // TODO(khokhlov): Remove this when Chrome correctly sets client_priority
+  // for startup tracing (and propagates it to all child processes).
+  if (config.has_chrome_config()) {
+    config.mutable_chrome_config()->set_client_priority(
+        perfetto::protos::gen::ChromeConfig::UNKNOWN);
+  }
   base::Hasher hasher;
   std::string config_bytes = config.SerializeAsString();
   hasher.Update(config_bytes.data(), config_bytes.size());