diff --git a/src/platforms/common/swdptap.c b/src/platforms/common/swdptap.c
index 6f51f761c14..458d43bc614 100644
--- a/src/platforms/common/swdptap.c
+++ b/src/platforms/common/swdptap.c
@@ -199,10 +199,10 @@ static void swdptap_seq_out(const uint32_t tms_states, const size_t clock_cycles
 
 static void swdptap_seq_out_parity(const uint32_t tms_states, const size_t clock_cycles)
 {
-	const int parity = __builtin_popcount(tms_states);
+	const uint8_t parity = __builtin_popcount(tms_states) & 1U;
 	swdptap_seq_out(tms_states, clock_cycles);
 
-	gpio_set_val(SWDIO_PORT, SWDIO_PIN, parity & 1U);
+	gpio_set_val(SWDIO_PORT, SWDIO_PIN, parity);
 	if (target_clk_divider != UINT32_MAX)
 		platform_delay_busy(target_clk_divider);