diff --git a/src/keyboard_at.c b/src/keyboard_at.c
index 135ebe6..c4a3c72 100644
--- a/src/keyboard_at.c
+++ b/src/keyboard_at.c
@@ -445,7 +445,6 @@ void keyboard_at_write(uint16_t port, uint8_t val, void *priv)
 uint8_t keyboard_at_read(uint16_t port, void *priv)
 {
         uint8_t temp = 0xff;
-        cycles -= 4;
 //        if (port != 0x61) pclog("keyboard_at : read %04X ", port);
         switch (port)
         {