diff --git a/alsamixer/volume_mapping.c b/alsamixer/volume_mapping.c
index 9cacad8..f08f003 100644
--- a/alsamixer/volume_mapping.c
+++ b/alsamixer/volume_mapping.c
@@ -109,9 +109,9 @@ static double get_normalized_volume(snd_mixer_elem_t *elem,
 	if (use_linear_dB_scale(min, max))
 		return (value - min) / (double)(max - min);
 
-	normalized = exp10((value - max) / 6000.0);
+	normalized = exp(M_LN10 * (value - max) / 6000.0);
 	if (min != SND_CTL_TLV_DB_GAIN_MUTE) {
-		min_norm = exp10((min - max) / 6000.0);
+		min_norm = exp(M_LN10 * (min - max) / 6000.0);
 		normalized = (normalized - min_norm) / (1 - min_norm);
 	}
 
@@ -144,7 +144,7 @@ static int set_normalized_volume(snd_mixer_elem_t *elem,
 	}
 
 	if (min != SND_CTL_TLV_DB_GAIN_MUTE) {
-		min_norm = exp10((min - max) / 6000.0);
+		min_norm = exp(M_LN10 * (min - max) / 6000.0);
 		volume = volume * (1 - min_norm) + min_norm;
 	}
 	value = lrint_dir(6000.0 * log10(volume), dir) + max;