diff --git a/src/helper/log.h b/src/helper/log.h
index ee71bf03f..818716a9d 100644
--- a/src/helper/log.h
+++ b/src/helper/log.h
@@ -114,6 +114,15 @@ extern int debug_level;
 				expr); \
 	} while (0)
 
+#define LOG_CUSTOM_LEVEL(level, expr ...) \
+	do { \
+		enum log_levels _level = level; \
+		if (debug_level >= _level) \
+			log_printf_lf(_level, \
+				__FILE__, __LINE__, __func__, \
+				expr); \
+	} while (0)
+
 #define LOG_INFO(expr ...) \
 	log_printf_lf(LOG_LVL_INFO, __FILE__, __LINE__, __func__, expr)
 
diff --git a/src/jtag/drivers/ftdi.c b/src/jtag/drivers/ftdi.c
index 2bde93169..58f83af59 100644
--- a/src/jtag/drivers/ftdi.c
+++ b/src/jtag/drivers/ftdi.c
@@ -1088,7 +1088,8 @@ static int ftdi_swd_run_queue(void)
 		/* Devices do not reply to DP_TARGETSEL write cmd, ignore received ack */
 		bool check_ack = swd_cmd_returns_ack(swd_cmd_queue[i].cmd);
 
-		LOG_DEBUG_IO("%s%s %s %s reg %X = %08"PRIx32,
+		LOG_CUSTOM_LEVEL((check_ack && ack != SWD_ACK_OK) ? LOG_LVL_DEBUG : LOG_LVL_DEBUG_IO,
+				"%s%s %s %s reg %X = %08" PRIx32,
 				check_ack ? "" : "ack ignored ",
 				ack == SWD_ACK_OK ? "OK" : ack == SWD_ACK_WAIT ? "WAIT" : ack == SWD_ACK_FAULT ? "FAULT" : "JUNK",
 				swd_cmd_queue[i].cmd & SWD_CMD_APNDP ? "AP" : "DP",