diff --git a/libserialport.h.in b/libserialport.h.in
index f9f5b24..9eb5e0c 100644
--- a/libserialport.h.in
+++ b/libserialport.h.in
@@ -52,6 +52,17 @@ struct sp_port {
 #endif
 };
 
+/* Configuration for a serial port. */
+struct sp_port_config {
+	int baudrate;
+	int bits;
+	int parity;
+	int stopbits;
+	int flowcontrol;
+	int rts;
+	int dtr;
+};
+
 /* Return values. */
 enum {
 	/* Operation completed successfully. */
@@ -104,8 +115,7 @@ int sp_close(struct sp_port *port);
 int sp_flush(struct sp_port *port);
 int sp_write(struct sp_port *port, const void *buf, size_t count);
 int sp_read(struct sp_port *port, void *buf, size_t count);
-int sp_set_params(struct sp_port *port, int baudrate, int bits, int parity,
-		int stopbits, int flowcontrol, int rts, int dtr);
+int sp_set_config(struct sp_port *port, struct sp_port_config *config);
 int sp_last_error_code(void);
 char *sp_last_error_message(void);
 void sp_free_error_message(char *message);
diff --git a/serialport.c b/serialport.c
index 5d8dabb..3f6b35c 100644
--- a/serialport.c
+++ b/serialport.c
@@ -821,19 +821,18 @@ static int apply_config(struct sp_port *port, struct sp_port_data *data)
 
 #define TRY(x) do { int ret = x; if (ret != SP_OK) return ret; } while (0)
 
-int sp_set_params(struct sp_port *port, int baudrate, int bits, int parity,
-		int stopbits, int flowcontrol, int rts, int dtr)
+int sp_set_config(struct sp_port *port, struct sp_port_config *config)
 {
 	struct sp_port_data data;
 
 	TRY(start_config(port, &data));
-	TRY(set_baudrate(&data, baudrate));
-	TRY(set_bits(&data, bits));
-	TRY(set_parity(&data, parity));
-	TRY(set_stopbits(&data, stopbits));
-	TRY(set_flowcontrol(&data, flowcontrol));
-	TRY(set_rts(&data, rts));
-	TRY(set_dtr(&data, dtr));
+	TRY(set_baudrate(&data, config->baudrate));
+	TRY(set_bits(&data, config->bits));
+	TRY(set_parity(&data, config->parity));
+	TRY(set_stopbits(&data, config->stopbits));
+	TRY(set_flowcontrol(&data, config->flowcontrol));
+	TRY(set_rts(&data, config->rts));
+	TRY(set_dtr(&data, config->dtr));
 	TRY(apply_config(port, &data));
 
 	return SP_OK;