diff --git a/generate_font.py b/generate_font.py
index 239aa24..82a915d 100755
--- a/generate_font.py
+++ b/generate_font.py
@@ -16,6 +16,7 @@ add_string(used_set,"PV")
 add_string(used_set,"Out")
 add_string(used_set,"VA%+- .")
 add_string(used_set,"/-\\|")
+add_string(used_set,"ONOFF")
 
 if "?" in used_set:
     used_set.remove("?")
diff --git a/src/font.c b/src/font.c
index 224e92f..f817768 100644
--- a/src/font.c
+++ b/src/font.c
@@ -191,6 +191,26 @@ unsigned char my_font_[][16] =
     0xef,0x0f,
     0x1f,0xff,
  },
+ {
+    0xdf,0xc0,
+    0xc0,0xdd,
+    0xd8,0xcf,
+    0xc7,0xff,
+    0xef,0x0f,
+    0x0f,0xef,
+    0xff,0xff,
+    0xff,0xff,
+ },
+ {
+    0xc0,0xc0,
+    0xe3,0xf1,
+    0xf8,0xc0,
+    0xc0,0xff,
+    0x0f,0x0f,
+    0xff,0xff,
+    0xff,0x0f,
+    0x0f,0xff,
+ },
  {
     0xe0,0xc0,
     0xdf,0xdf,
@@ -293,6 +313,8 @@ char my_font_map_[]=
    '9',
    'A',
    'B',
+   'F',
+   'N',
    'O',
    'P',
    'V',