diff --git a/gtk-gui.c b/gtk-gui.c
index b889f114d..4ac538a06 100644
--- a/gtk-gui.c
+++ b/gtk-gui.c
@@ -116,7 +116,7 @@ static void file_open(GtkWidget *w, gpointer data)
 		
 		GError *error = NULL;
 		while(filenames != NULL) {
-			filename = (char *)filenames->data;
+			filename = filenames->data;
 			parse_xml_file(filename, &error);
 			if (error != NULL)
 			{
@@ -883,7 +883,7 @@ static GtkWidget *xml_file_selector(GtkWidget *vbox, GtkWidget *main_dialog)
 static void do_import_file(gpointer data, gpointer user_data)
 {
 	GError *error = NULL;
-	parse_xml_file((char *)data, &error);
+	parse_xml_file(data, &error);
 
 	if (error != NULL)
 	{
diff --git a/libdivecomputer.c b/libdivecomputer.c
index bcf59eeb5..b1c86c5ee 100644
--- a/libdivecomputer.c
+++ b/libdivecomputer.c
@@ -411,10 +411,10 @@ static device_status_t device_open(const char *devname,
 
 static void event_cb(device_t *device, device_event_t event, const void *data, void *userdata)
 {
-	const device_progress_t *progress = (device_progress_t *) data;
-	const device_devinfo_t *devinfo = (device_devinfo_t *) data;
-	const device_clock_t *clock = (device_clock_t *) data;
-	device_data_t *devdata = (device_data_t *) userdata;
+	const device_progress_t *progress = data;
+	const device_devinfo_t *devinfo = data;
+	const device_clock_t *clock = data;
+	device_data_t *devdata = userdata;
 
 	switch (event) {
 	case DEVICE_EVENT_WAITING: