diff --git a/components/ocs_sensor/sht4x/sensor.cpp b/components/ocs_sensor/sht4x/sensor.cpp
index 1dab0be9..b890a608 100644
--- a/components/ocs_sensor/sht4x/sensor.cpp
+++ b/components/ocs_sensor/sht4x/sensor.cpp
@@ -175,7 +175,7 @@ status::StatusCode Sensor::initialize_() {
 
     ocs_logi(log_tag_.c_str(),
              "initialized: serial_number=%s measure_command=%s "
-             "heating_command=%s heating_delay=%lu(ms) heating_count=%u",
+             "heating_command=%s heating_delay=%lu(ms) heating_count=%lu",
              serial_number_to_str(serial_number_).c_str(),
              command_to_str_(params_.measure_command),
              command_to_str_(params_.heating_command), pdTICKS_TO_MS(heating_delay_),
diff --git a/components/ocs_sensor/sht4x/sensor.h b/components/ocs_sensor/sht4x/sensor.h
index a5eb43e9..f0ad0476 100644
--- a/components/ocs_sensor/sht4x/sensor.h
+++ b/components/ocs_sensor/sht4x/sensor.h
@@ -31,7 +31,7 @@ class Sensor : public scheduler::ITask, private core::NonCopyable<> {
     struct Data {
         double humidity { 0.0 };
         double temperature { 0.0 };
-        size_t heating_count { 0 };
+        uint32_t heating_count { 0 };
     };
 
     enum class Command {
@@ -136,7 +136,7 @@ class Sensor : public scheduler::ITask, private core::NonCopyable<> {
     storage::IStorage& storage_;
 
     TickType_t heating_delay_ { 0 };
-    size_t heating_count_ { 0 };
+    uint32_t heating_count_ { 0 };
 
     bool initialized_ { false };
     SerialNumber serial_number_ { 0 };