diff --git a/src/serial_posix.c b/src/serial_posix.c
index f4cfa14..d44c51d 100644
--- a/src/serial_posix.c
+++ b/src/serial_posix.c
@@ -132,6 +132,8 @@ serial_open (serial_t **out, dc_context_t *context, const char* name)
 	if (out == NULL)
 		return -1; // EINVAL (Invalid argument)
 
+	INFO (context, "Open: name=%s", name ? name : "");
+
 	// Allocate memory.
 	serial_t *device = (serial_t *) malloc (sizeof (serial_t));
 	if (device == NULL) {
diff --git a/src/serial_win32.c b/src/serial_win32.c
index 62cf486..cef0704 100644
--- a/src/serial_win32.c
+++ b/src/serial_win32.c
@@ -111,6 +111,8 @@ serial_open (serial_t **out, dc_context_t *context, const char* name)
 	if (out == NULL)
 		return -1; // ERROR_INVALID_PARAMETER (The parameter is incorrect)
 
+	INFO (context, "Open: name=%s", name ? name : "");
+
 	// Build the device name.
 	const char *devname = NULL;
 	char buffer[MAX_PATH] = "\\\\.\\";