@ -993,7 +993,7 @@ TEST_CASE("Plane") {
c = -1;
do{
++c;
if(!isprint(c)){
if(c && !isprint(c)){
CHECK(0 > ncplane_putchar_yx(n_, 0, 0, c));
}else{
CHECK(1 == ncplane_putchar_yx(n_, 0, 0, c));