diff --git a/sapi/fpm/fpm/zlog.c b/sapi/fpm/fpm/zlog.c
index 3cc4175a245d..e5e49f8385d2 100644
--- a/sapi/fpm/fpm/zlog.c
+++ b/sapi/fpm/fpm/zlog.c
@@ -645,7 +645,7 @@ zlog_bool zlog_stream_set_msg_suffix(
 		stream->msg_final_suffix_len = strlen(final_suffix);
 		len = stream->msg_final_suffix_len + 1;
 		if (stream->msg_final_suffix != NULL) {
-			free(stream->msg_suffix);
+			free(stream->msg_final_suffix);
 		}
 		stream->msg_final_suffix = malloc(len);
 		if (stream->msg_final_suffix == NULL) {