diff --git a/coreapi/linphonecore.c b/coreapi/linphonecore.c
index 0f5f7a7db..9200aadf8 100644
--- a/coreapi/linphonecore.c
+++ b/coreapi/linphonecore.c
@@ -3320,7 +3320,7 @@ void linphone_core_set_mic_gain_db (LinphoneCore *lc, float gaindb){
 	lc->sound_conf.soft_mic_lev=gaindb;
 
 	if (linphone_core_ready(lc)){
-		lp_config_set_int(lc->config,"sound","mic_gain_db",lc->sound_conf.soft_mic_lev);
+		lp_config_set_float(lc->config,"sound","mic_gain_db",lc->sound_conf.soft_mic_lev);
 	}
 
 	if (call==NULL || (st=call->audiostream)==NULL){
@@ -3353,7 +3353,7 @@ void linphone_core_set_playback_gain_db (LinphoneCore *lc, float gaindb){
 
 	lc->sound_conf.soft_play_lev=gaindb;
 	if (linphone_core_ready(lc)){
-		lp_config_set_int(lc->config,"sound","playback_gain_db",lc->sound_conf.soft_play_lev);
+		lp_config_set_float(lc->config,"sound","playback_gain_db",lc->sound_conf.soft_play_lev);
 	}
 
 	if (call==NULL || (st=call->audiostream)==NULL){