diff --git a/ref/uxn.c b/ref/uxn.c
index f6dee7a..866b0ee 100644
--- a/ref/uxn.c
+++ b/ref/uxn.c
@@ -133,7 +133,7 @@ main(int argc, char **argv)
 			console_input(&u, '\n', i == argc - 1 ? 0x4 : 0x3);
 		}
 		while(!u.dev[0x0f]) {
-			char c = fgetc(stdin);
+			int c = fgetc(stdin);
 			if(c == EOF) {
 				console_input(&u, 0x00, 0x4);
 				break;