diff --git a/packages/playfair/src/playfair.c b/packages/playfair/src/playfair.c
index abd1667..f87f272 100644
--- a/packages/playfair/src/playfair.c
+++ b/packages/playfair/src/playfair.c
@@ -158,7 +158,7 @@ run(char* key) {
       }
     } else if (91 <= tmp && tmp <= 122) {
       if (existing) {
-        if (tmp == buf[0]) {
+        if (tmp == buf[0] && tmp != 'x') {
           buf[1] = 'x';
           swapchar(key, buf);
           printcrap(buf);