diff --git a/src/tty.c b/src/tty.c
index 2a1aea9..ac0cf2a 100644
--- a/src/tty.c
+++ b/src/tty.c
@@ -70,12 +70,14 @@ static bool map_o_del_bs = false;
 
 static void print_hex(char c)
 {
-    printf("%02x ", (unsigned char)c);
+    printf("%02x ", (unsigned char) c);
+    fflush(stdout);
 }
 
 static void print_normal(char c)
 {
     putchar(c);
+    fflush(stdout);
 }
 
 static void toggle_line(const char *line_name, int mask)