diff --git a/main.c b/main.c
index b35bce4..507be26 100644
--- a/main.c
+++ b/main.c
@@ -360,7 +360,7 @@ int main(int argc, char **argv)
         case 'l':
             fake_tls.data = ftob(optarg, &fake_tls.size);
             if (!fake_tls.data) {
-                perror("read file");
+                uniperror("read file");
                 return -1;
             }
             break;
@@ -368,7 +368,7 @@ int main(int argc, char **argv)
         case 'o':
             fake_http.data = ftob(optarg, &fake_http.size);
             if (!fake_http.data) {
-                perror("read file");
+                uniperror("read file");
                 return -1;
             }
             break;
@@ -376,7 +376,7 @@ int main(int argc, char **argv)
         case 'e':
             oob_data.data = ftob(optarg, &oob_data.size);
             if (!oob_data.data) {
-                perror("read file");
+                uniperror("read file");
                 return -1;
             }
             break;
diff --git a/packets.c b/packets.c
index ab1b095..d6de09a 100644
--- a/packets.c
+++ b/packets.c
@@ -85,7 +85,7 @@ int find_tls_ext_offset(uint16_t type, char *data, size_t size)
 }
 
 
-int change_tls_sni(char *host, char *buffer, size_t bsize)
+int change_tls_sni(const char *host, char *buffer, size_t bsize)
 {
     int sni_offs, pad_offs;
     
diff --git a/packets.h b/packets.h
index e16b80b..a52b6a6 100644
--- a/packets.h
+++ b/packets.h
@@ -13,7 +13,7 @@
 extern char tls_data[517];
 extern char http_data[43];
 
-int change_tls_sni(char *host, char *buffer, size_t bsize);
+int change_tls_sni(const char *host, char *buffer, size_t bsize);
 
 int parse_tls(char *buffer, size_t bsize, char **hs);
 
diff --git a/proxy.c b/proxy.c
index 1589f1d..5067723 100644
--- a/proxy.c
+++ b/proxy.c
@@ -529,7 +529,7 @@ static inline int on_tunnel(struct poolhd *pool, struct eval *val,
             
             val->size = n - sn;
             if (!(val->tmpbuf = malloc(val->size))) {
-                perror("malloc");
+                uniperror("malloc");
                 return -1;
             }
             memcpy(val->tmpbuf, buffer + sn, val->size);
@@ -552,19 +552,19 @@ int event_loop(int srvfd)
     
     struct poolhd *pool = init_pool(params.max_open * 2 + 1);
     if (!pool) {
-        perror("init pool");
+        uniperror("init pool");
         close(srvfd);
         return -1;
     }
     if (!add_event(pool, EV_ACCEPT, srvfd, 0)) {
-        perror("add event");
+        uniperror("add event");
         destroy_pool(pool);
         close(srvfd);
         return -1;
     }
     char *buffer = malloc(params.bfsize);
     if (!buffer) {
-        perror("malloc");
+        uniperror("malloc");
         destroy_pool(pool);
         return -1;
     }