diff --git a/logging/rtc_event_log/events/rtc_event_field_encoding_parser.h b/logging/rtc_event_log/events/rtc_event_field_encoding_parser.h
index 6b0270b127..d3719e575e 100644
--- a/logging/rtc_event_log/events/rtc_event_field_encoding_parser.h
+++ b/logging/rtc_event_log/events/rtc_event_field_encoding_parser.h
@@ -36,7 +36,9 @@ class RtcEventLogParseStatus {
   }
 
   bool ok() const { return error_.empty(); }
-  ABSL_DEPRECATED("Use ok() instead") operator bool() const { return ok(); }
+  ABSL_DEPRECATED("Use ok() instead") explicit operator bool() const {
+    return ok();
+  }
 
   std::string message() const { return error_; }
 
diff --git a/modules/congestion_controller/goog_cc/probe_controller.cc b/modules/congestion_controller/goog_cc/probe_controller.cc
index cb75456fde..df753ed0c9 100644
--- a/modules/congestion_controller/goog_cc/probe_controller.cc
+++ b/modules/congestion_controller/goog_cc/probe_controller.cc
@@ -225,7 +225,7 @@ std::vector<ProbeClusterConfig> ProbeController::OnMaxTotalAllocatedBitrate(
         probes.push_back(second_probe_rate.bps());
     }
     return InitiateProbing(at_time_ms, probes,
-                           config_.allocation_allow_further_probing);
+                           config_.allocation_allow_further_probing.Get());
   }
   max_total_allocated_bitrate_ = max_total_allocated_bitrate;
   return std::vector<ProbeClusterConfig>();
diff --git a/modules/desktop_capture/linux/wayland/shared_screencast_stream.cc b/modules/desktop_capture/linux/wayland/shared_screencast_stream.cc
index 8fae69ed9c..1afb0ee491 100644
--- a/modules/desktop_capture/linux/wayland/shared_screencast_stream.cc
+++ b/modules/desktop_capture/linux/wayland/shared_screencast_stream.cc
@@ -149,7 +149,7 @@ class ScopedBuf {
     }
   }
 
-  operator bool() { return map_ != MAP_FAILED; }
+  explicit operator bool() { return map_ != MAP_FAILED; }
 
   void initialize(uint8_t* map, int map_size, int fd) {
     map_ = map;
diff --git a/rtc_base/experiments/field_trial_parser.h b/rtc_base/experiments/field_trial_parser.h
index c67ef542d3..bd11eea20a 100644
--- a/rtc_base/experiments/field_trial_parser.h
+++ b/rtc_base/experiments/field_trial_parser.h
@@ -220,7 +220,7 @@ class FieldTrialFlag : public FieldTrialParameterInterface {
   explicit FieldTrialFlag(std::string key);
   FieldTrialFlag(std::string key, bool default_value);
   bool Get() const;
-  operator bool() const;
+  explicit operator bool() const;
 
  protected:
   bool Parse(absl::optional<std::string> str_value) override;
diff --git a/sdk/objc/unittests/scoped_cftyperef_tests.mm b/sdk/objc/unittests/scoped_cftyperef_tests.mm
index 2aa85182a6..26a6d0b3b9 100644
--- a/sdk/objc/unittests/scoped_cftyperef_tests.mm
+++ b/sdk/objc/unittests/scoped_cftyperef_tests.mm
@@ -16,7 +16,7 @@ namespace {
 struct TestType {
   TestType() : has_value(true) {}
   TestType(bool b) : has_value(b) {}
-  operator bool() { return has_value; }
+  explicit operator bool() { return has_value; }
   bool has_value;
   int retain_count = 0;
 };