diff --git a/stlinkv3_spi.c b/stlinkv3_spi.c
index a1d062b..b15c703 100644
--- a/stlinkv3_spi.c
+++ b/stlinkv3_spi.c
@@ -448,7 +448,7 @@
 	.probe_opcode	= default_spi_probe_opcode,
 };
 
-static int stlinkv3_spi_init(void)
+static int stlinkv3_spi_init(struct flashprog_programmer *const prog)
 {
 	uint16_t sck_freq_kHz = 1000;	// selecting 1 MHz SCK is a good bet
 	char *speed_str = NULL;