diff --git a/get_shadow_line.c b/get_shadow_line.c
index 84ab79d..2c289ab 100644
--- a/get_shadow_line.c
+++ b/get_shadow_line.c
@@ -22,8 +22,12 @@ static int read_config(struct sockaddr_in *addr) {
     int port = -1;
     while (1) {
         int status = getline(&line, &n, f);
-        if (status == -1)
-             break;
+        if (status == -1) {
+            if (feof(f))
+                break;
+            perror(conf_filename);
+            return -1;
+        }
         char *comment = strchr(line, '#');
         if (comment) {
             *comment = 0;