diff --git a/main.c b/main.c
index 6b47bfe..e88c5da 100644
--- a/main.c
+++ b/main.c
@@ -95,9 +95,6 @@ const char help_text[] = {
     "    -e, --oob-data <f|:str>   Set custom OOB data, filename or :string\n"
     "    -M, --mod-http <h,d,r>    Modify HTTP: hcsmix,dcsmix,rmspace\n"
     "    -r, --tlsrec <n[+s]>      Make TLS record at position\n"
-    #ifdef __linux__
-    "    -m, --mss <size>          Set MSS for outgoing connections\n"
-    #endif
 };
 
 
@@ -141,9 +138,6 @@ const struct option options[] = {
     {"mod-http",      1, 0, 'M'},
     {"tlsrec",        1, 0, 'r'},
     {"def-ttl",       1, 0, 'g'},
-    #ifdef __linux__
-    {"mss",           1, 0, 'm'},
-    #endif
     {"delay",         1, 0, 'w'}, //
     {"not-wait-send", 0, 0, 'W'}, //
     {0}
@@ -640,15 +634,6 @@ int main(int argc, char **argv)
             }
             break;
             
-        case 'm':
-            val = strtol(optarg, &end, 0);
-            if (val < 88 || val > 32767 || *end)
-                invalid = 1;
-            else {
-                dp->mss = val;
-            }
-            break;
-            
         case 'g':
             val = strtol(optarg, &end, 0);
             if (val <= 0 || val > 255 || *end)
diff --git a/params.h b/params.h
index c52ccd1..f3855c9 100644
--- a/params.h
+++ b/params.h
@@ -49,7 +49,6 @@ struct desync_params {
     int mod_http;
     int tlsrec_n;
     struct part *tlsrec;
-    int mss;
     int spos_n;
     struct spos *spos;
 };
diff --git a/proxy.c b/proxy.c
index 81a9f1d..575271c 100644
--- a/proxy.c
+++ b/proxy.c
@@ -291,7 +291,7 @@ int s5_get_addr(char *buffer, ssize_t n,
 
 
 int create_conn(struct poolhd *pool,
-        struct eval *val, struct sockaddr_ina *dst, int next, int mss)
+        struct eval *val, struct sockaddr_ina *dst, int next)
 {
     struct sockaddr_ina addr = *dst;
     
@@ -332,12 +332,6 @@ int create_conn(struct poolhd *pool,
         close(sfd);
         return -1;
     }
-    if (mss && setsockopt(sfd, IPPROTO_TCP,
-            TCP_MAXSEG, (char *)&mss, sizeof(mss))) {
-        uniperror("setsockopt TCP_MAXSEG");
-        close(sfd);
-        return -1;
-    }
     #ifdef TCP_FASTOPEN_CONNECT
     int yes = 1;
     if (params.tfo && setsockopt(sfd, IPPROTO_TCP,
@@ -582,16 +576,14 @@ static inline int on_request(struct poolhd *pool, struct eval *val,
         }
         return -1;
     }
-    int m = mode_add_get(&dst, -1);
-    struct desync_params dp = params.dp[m < 0 ? 0 : m];
-    
-    error = create_conn(pool, val, &dst, EV_CONNECT, dp.mss);
+    error = create_conn(pool, val, &dst, EV_CONNECT);
     if (error) {
         int en = get_e();
         if (resp_error(val->fd, en ? en : error, val->flag) < 0)
             uniperror("send");
         return -1;
     }
+    int m = mode_add_get(&dst, -1);
     if (m >= 0) {
         val->attempt = m;
     }
@@ -615,10 +607,9 @@ int try_again(struct poolhd *pool, struct eval *val, char data)
             (struct sockaddr_ina *)&val->in6, 0);
         return -1;
     }
-    struct desync_params dp = params.dp[m];
     
     if (create_conn(pool, client, 
-            (struct sockaddr_ina *)&val->in6, EV_DESYNC, dp.mss)) {
+            (struct sockaddr_ina *)&val->in6, EV_DESYNC)) {
         return -1;
     }
     val->pair = 0;