diff --git a/docs/misc/toif.md b/docs/misc/toif.md
index 6227e2f19..a63f9cc42 100644
--- a/docs/misc/toif.md
+++ b/docs/misc/toif.md
@@ -1,4 +1,4 @@
-# Trezor Optimized Image Format
+# Trezor Optimized Image Format (TOIF)
 
 All multibyte integer values are little endian!