diff --git a/coreapi/lpconfig.c b/coreapi/lpconfig.c
index db4e5de5c..dd3de63db 100644
--- a/coreapi/lpconfig.c
+++ b/coreapi/lpconfig.c
@@ -215,7 +215,7 @@ LpConfig * lp_config_new(const char *filename){
 	if (filename!=NULL){
 		ms_message("Using (r/w) config information from %s", filename);
 		lpconfig->filename=ortp_strdup(filename);
-		lpconfig->file=fopen(filename,"rw");
+		lpconfig->file=fopen(filename,"r+");
 		if (lpconfig->file!=NULL){
 			struct stat fileStat;
 			lp_config_parse(lpconfig,lpconfig->file);