diff --git a/services/inputflinger/InputDispatcher.h b/services/inputflinger/InputDispatcher.h
index 1c054f5..90c69ce 100644
--- a/services/inputflinger/InputDispatcher.h
+++ b/services/inputflinger/InputDispatcher.h
@@ -455,7 +455,7 @@
     };
 
     struct ConfigurationChangedEntry : EventEntry {
-        ConfigurationChangedEntry(nsecs_t eventTime);
+        explicit ConfigurationChangedEntry(nsecs_t eventTime);
         virtual void appendDescription(String8& msg) const;
 
     protected:
@@ -591,7 +591,7 @@
 
     class Connection;
     struct CommandEntry : Link<CommandEntry> {
-        CommandEntry(Command command);
+        explicit CommandEntry(Command command);
         ~CommandEntry();
 
         Command command;
diff --git a/services/inputflinger/InputListener.h b/services/inputflinger/InputListener.h
index 1ec09ce..ea3dd1c 100644
--- a/services/inputflinger/InputListener.h
+++ b/services/inputflinger/InputListener.h
@@ -40,7 +40,7 @@
 
     inline NotifyConfigurationChangedArgs() { }
 
-    NotifyConfigurationChangedArgs(nsecs_t eventTime);
+    explicit NotifyConfigurationChangedArgs(nsecs_t eventTime);
 
     NotifyConfigurationChangedArgs(const NotifyConfigurationChangedArgs& other);
 
@@ -178,7 +178,7 @@
     virtual ~QueuedInputListener();
 
 public:
-    QueuedInputListener(const sp<InputListenerInterface>& innerListener);
+    explicit QueuedInputListener(const sp<InputListenerInterface>& innerListener);
 
     virtual void notifyConfigurationChanged(const NotifyConfigurationChangedArgs* args);
     virtual void notifyKey(const NotifyKeyArgs* args);
diff --git a/services/inputflinger/InputReader.h b/services/inputflinger/InputReader.h
index 076f3d6..8e2fe95 100644
--- a/services/inputflinger/InputReader.h
+++ b/services/inputflinger/InputReader.h
@@ -484,7 +484,7 @@
         InputReader* mReader;
 
     public:
-        ContextImpl(InputReader* reader);
+        explicit ContextImpl(InputReader* reader);
 
         virtual void updateGlobalMetaState();
         virtual int32_t getGlobalMetaState();
@@ -568,7 +568,7 @@
 /* Reads raw events from the event hub and processes them, endlessly. */
 class InputReaderThread : public Thread {
 public:
-    InputReaderThread(const sp<InputReaderInterface>& reader);
+    explicit InputReaderThread(const sp<InputReaderInterface>& reader);
     virtual ~InputReaderThread();
 
 private:
@@ -1007,7 +1007,7 @@
  */
 class InputMapper {
 public:
-    InputMapper(InputDevice* device);
+    explicit InputMapper(InputDevice* device);
     virtual ~InputMapper();
 
     inline InputDevice* getDevice() { return mDevice; }
@@ -1058,7 +1058,7 @@
 
 class SwitchInputMapper : public InputMapper {
 public:
-    SwitchInputMapper(InputDevice* device);
+    explicit SwitchInputMapper(InputDevice* device);
     virtual ~SwitchInputMapper();
 
     virtual uint32_t getSources();
@@ -1078,7 +1078,7 @@
 
 class VibratorInputMapper : public InputMapper {
 public:
-    VibratorInputMapper(InputDevice* device);
+    explicit VibratorInputMapper(InputDevice* device);
     virtual ~VibratorInputMapper();
 
     virtual uint32_t getSources();
@@ -1178,7 +1178,7 @@
 
 class CursorInputMapper : public InputMapper {
 public:
-    CursorInputMapper(InputDevice* device);
+    explicit CursorInputMapper(InputDevice* device);
     virtual ~CursorInputMapper();
 
     virtual uint32_t getSources();
@@ -1243,7 +1243,7 @@
 
 class RotaryEncoderInputMapper : public InputMapper {
 public:
-    RotaryEncoderInputMapper(InputDevice* device);
+    explicit RotaryEncoderInputMapper(InputDevice* device);
     virtual ~RotaryEncoderInputMapper();
 
     virtual uint32_t getSources();
@@ -1264,7 +1264,7 @@
 
 class TouchInputMapper : public InputMapper {
 public:
-    TouchInputMapper(InputDevice* device);
+    explicit TouchInputMapper(InputDevice* device);
     virtual ~TouchInputMapper();
 
     virtual uint32_t getSources();
@@ -1887,7 +1887,7 @@
 
 class SingleTouchInputMapper : public TouchInputMapper {
 public:
-    SingleTouchInputMapper(InputDevice* device);
+    explicit SingleTouchInputMapper(InputDevice* device);
     virtual ~SingleTouchInputMapper();
 
     virtual void reset(nsecs_t when);
@@ -1905,7 +1905,7 @@
 
 class MultiTouchInputMapper : public TouchInputMapper {
 public:
-    MultiTouchInputMapper(InputDevice* device);
+    explicit MultiTouchInputMapper(InputDevice* device);
     virtual ~MultiTouchInputMapper();
 
     virtual void reset(nsecs_t when);
@@ -1926,7 +1926,7 @@
 
 class ExternalStylusInputMapper : public InputMapper {
 public:
-    ExternalStylusInputMapper(InputDevice* device);
+    explicit ExternalStylusInputMapper(InputDevice* device);
     virtual ~ExternalStylusInputMapper() = default;
 
     virtual uint32_t getSources();
@@ -1948,7 +1948,7 @@
 
 class JoystickInputMapper : public InputMapper {
 public:
-    JoystickInputMapper(InputDevice* device);
+    explicit JoystickInputMapper(InputDevice* device);
     virtual ~JoystickInputMapper();
 
     virtual uint32_t getSources();
diff --git a/services/inputflinger/InputWindow.h b/services/inputflinger/InputWindow.h
index e243637..feca6cf 100644
--- a/services/inputflinger/InputWindow.h
+++ b/services/inputflinger/InputWindow.h
@@ -196,7 +196,7 @@
     void releaseInfo();
 
 protected:
-    InputWindowHandle(const sp<InputApplicationHandle>& inputApplicationHandle);
+    explicit InputWindowHandle(const sp<InputApplicationHandle>& inputApplicationHandle);
     virtual ~InputWindowHandle();
 
     InputWindowInfo* mInfo;
diff --git a/services/inputflinger/host/InputDriver.h b/services/inputflinger/host/InputDriver.h
index 8d5a31e..e56673b 100644
--- a/services/inputflinger/host/InputDriver.h
+++ b/services/inputflinger/host/InputDriver.h
@@ -82,7 +82,7 @@
 
 class InputDriver : public InputDriverInterface {
 public:
-    InputDriver(const char* name);
+    explicit InputDriver(const char* name);
     virtual ~InputDriver() = default;
 
     virtual void init() override;