diff --git a/src/F4Server.c b/src/F4Server.c
index 2558d80..67737e6 100644
--- a/src/F4Server.c
+++ b/src/F4Server.c
@@ -207,7 +207,7 @@ int main(int argc, char *argv[]){
 
     do {
         semOp(semid, turn, 1);
-        turn = (turn + 1) % 2;          // FIXME: si puo scrivere meglio?
+        turn ^= 1;
 
         printfServer("");
         printf("%s's turn\n", name[turn]);