diff --git a/plugins/autopair.c b/plugins/autopair.c
index 5aa80df..e6e5035 100644
--- a/plugins/autopair.c
+++ b/plugins/autopair.c
@@ -51,9 +51,9 @@
  */
 
 static ssize_t autopair_pincb(struct btd_adapter *adapter,
-					struct btd_device *device,
-					char *pinbuf, gboolean *display,
-					unsigned int attempt)
+						struct btd_device *device,
+						char *pinbuf, bool *display,
+						unsigned int attempt)
 {
 	char addr[18];
 	char pinstr[7];
@@ -109,7 +109,7 @@ static ssize_t autopair_pincb(struct btd_adapter *adapter,
 
 			snprintf(pinstr, sizeof(pinstr), "%06d",
 						rand() % 1000000);
-			*display = TRUE;
+			*display = true;
 			memcpy(pinbuf, pinstr, 6);
 			return 6;
 
diff --git a/plugins/wiimote.c b/plugins/wiimote.c
index 12312b6..beda307 100644
--- a/plugins/wiimote.c
+++ b/plugins/wiimote.c
@@ -70,7 +70,8 @@ static const char *wii_names[] = {
 };
 
 static ssize_t wii_pincb(struct btd_adapter *adapter, struct btd_device *device,
-			char *pinbuf, gboolean *display, unsigned int attempt)
+						char *pinbuf, bool *display,
+						unsigned int attempt)
 {
 	uint16_t vendor, product;
 	char addr[18], name[25];
diff --git a/src/adapter.c b/src/adapter.c
index 1250966..52d2fc7 100644
--- a/src/adapter.c
+++ b/src/adapter.c
@@ -4817,8 +4817,7 @@ static ssize_t btd_adapter_pin_cb_iter_next(
 					struct btd_adapter_pin_cb_iter *iter,
 					struct btd_adapter *adapter,
 					struct btd_device *device,
-					char *pin_buf,
-					gboolean *display)
+					char *pin_buf, bool *display)
 {
 	btd_adapter_pin_cb_t cb;
 	ssize_t ret;
@@ -4843,7 +4842,7 @@ static void pin_code_request_callback(uint16_t index, uint16_t length,
 	const struct mgmt_ev_pin_code_request *ev = param;
 	struct btd_adapter *adapter = user_data;
 	struct btd_device *device;
-	gboolean display = FALSE;
+	bool display = false;
 	char pin[17];
 	ssize_t pinlen;
 	char addr[18];
diff --git a/src/adapter.h b/src/adapter.h
index 2de8730..32b12c0 100644
--- a/src/adapter.h
+++ b/src/adapter.h
@@ -132,7 +132,7 @@ int btd_cancel_authorization(guint id);
 int btd_adapter_restore_powered(struct btd_adapter *adapter);
 
 typedef ssize_t (*btd_adapter_pin_cb_t) (struct btd_adapter *adapter,
-			struct btd_device *dev, char *out, gboolean *display,
+			struct btd_device *dev, char *out, bool *display,
 							unsigned int attempt);
 void btd_adapter_register_pin_cb(struct btd_adapter *adapter,
 						btd_adapter_pin_cb_t cb);