diff --git a/firmware/common/radio.c b/firmware/common/radio.c
index 30db6872..1bd4af43 100644
--- a/firmware/common/radio.c
+++ b/firmware/common/radio.c
@@ -39,8 +39,13 @@ radio_error_t radio_set_sample_rate(
 
 	radio_config_t* config = &radio->channel[chan_id].config;
 
-	// TODO get the actual tuned frequency from sample_rate_frac_set
-	sample_rate.hz = (double) sample_rate.num / (double) sample_rate.div;
+	/*
+	 * Store the sample rate rounded to the nearest Hz for convenience.
+	 */
+	if (sample_rate.div == 0) {
+		return RADIO_ERR_INVALID_PARAM;
+	}
+	sample_rate.hz = (sample_rate.num + (sample_rate.div >> 1)) / sample_rate.div;
 
 	if (config->mode == TRANSCEIVER_MODE_OFF) {
 		config->sample_rate[element] = sample_rate;
diff --git a/firmware/common/radio.h b/firmware/common/radio.h
index caeca0b3..b6285cfb 100644
--- a/firmware/common/radio.h
+++ b/firmware/common/radio.h
@@ -77,7 +77,7 @@ typedef enum {
 typedef struct {
 	uint32_t num;
 	uint32_t div;
-	double hz;
+	uint32_t hz;
 } radio_sample_rate_t;
 
 typedef struct {