diff --git a/coreapi/linphonecore.c b/coreapi/linphonecore.c
index 651eca134..49a2601da 100644
--- a/coreapi/linphonecore.c
+++ b/coreapi/linphonecore.c
@@ -880,7 +880,7 @@ int linphone_core_get_download_ptime(LinphoneCore *lc) {
  *
 **/
 void linphone_core_set_upload_ptime(LinphoneCore *lc, int ptime){
-	lp_config_set_int(lc->config,"rtp","up_ptime",ptime);
+	lp_config_set_int(lc->config,"rtp","upload_ptime",ptime);
 }
 
 /**
@@ -889,7 +889,7 @@ void linphone_core_set_upload_ptime(LinphoneCore *lc, int ptime){
  *
 **/
 int linphone_core_get_upload_ptime(LinphoneCore *lc){
-	return lp_config_get_int(lc->config,"rtp","up_ptime",0);
+	return lp_config_get_int(lc->config,"rtp","upload_ptime",0);
 }