diff --git a/src/kiss.c b/src/kiss.c
index 7238801..8733301 100644
--- a/src/kiss.c
+++ b/src/kiss.c
@@ -278,12 +278,12 @@ static inline ssize_t write_command(int fd, int command, int port) {
     return write_byte(fd, ((port & 0x0f) << 4) | (command & 0x0f));
 }
 
+static unsigned char escape_fend[2] = { PATTY_KISS_FESC, PATTY_KISS_TFEND };
+static unsigned char escape_fesc[2] = { PATTY_KISS_FESC, PATTY_KISS_TFESC };
+
 ssize_t patty_kiss_tnc_send(patty_kiss_tnc *tnc, const void *buf, size_t len, int port) {
     size_t i, start = 0, end = 0;
 
-    unsigned char escape_fend[2] = { PATTY_KISS_FESC, PATTY_KISS_TFEND };
-    unsigned char escape_fesc[2] = { PATTY_KISS_FESC, PATTY_KISS_TFESC };
-
     if (write_byte(tnc->fd, PATTY_KISS_FEND) < 0) {
         goto error_io;
     }