--- a/thermferm/thermferm.c	Sat Mar 07 14:35:12 2015 +0100
+++ b/thermferm/thermferm.c	Sat Mar 07 14:40:08 2015 +0100
@@ -104,7 +104,7 @@
 {
     char	buf[21];
 
-    snprintt(buf, 20, "Old mode %s", UNITMODE[current_unit->mode]);
+    snprintf(buf, 20, "Old mode %s", UNITMODE[current_unit->mode]);
     lcdPuts(lcdHandle, buf);
     lcdPosition(lcdHandle, 0, 1);
 }