diff --git a/profiles/thermometer/thermometer.c b/profiles/thermometer/thermometer.c
index 3757b25..c2ca251 100644
--- a/profiles/thermometer/thermometer.c
+++ b/profiles/thermometer/thermometer.c
@@ -190,7 +190,7 @@ static void destroy_thermometer_adapter(gpointer user_data)
 	g_free(tadapter);
 }
 
-static gint cmp_adapter(gconstpointer a, gconstpointer b)
+static int cmp_adapter(gconstpointer a, gconstpointer b)
 {
 	const struct thermometer_adapter *tadapter = a;
 	const struct btd_adapter *adapter = b;
@@ -201,7 +201,7 @@ static gint cmp_adapter(gconstpointer a, gconstpointer b)
 	return -1;
 }
 
-static gint cmp_device(gconstpointer a, gconstpointer b)
+static int cmp_device(gconstpointer a, gconstpointer b)
 {
 	const struct thermometer *t = a;
 	const struct btd_device *dev = b;
@@ -212,7 +212,7 @@ static gint cmp_device(gconstpointer a, gconstpointer b)
 	return -1;
 }
 
-static gint cmp_watcher(gconstpointer a, gconstpointer b)
+static int cmp_watcher(gconstpointer a, gconstpointer b)
 {
 	const struct watcher *watcher = a;
 	const struct watcher *match = b;