diff --git a/README.md b/README.md
index 50d4d03..2087c94 100644
--- a/README.md
+++ b/README.md
@@ -73,6 +73,12 @@ A line was changed. Something was changed, but the amount of lines stayed the sa
 
 A line was changed and one or more of the lines below were deleted. A combination of **!** and **_**. The sign is shown on the same line.
 
+
+`‾`
+
+The first line was deleted. This special case is indicated by **‾** rather than
+**_**.
+
 Longer introduction
 -------------------
 
diff --git a/doc/signify.txt b/doc/signify.txt
index f9b4772..014bb1d 100644
--- a/doc/signify.txt
+++ b/doc/signify.txt
@@ -81,6 +81,10 @@ same. The sign is shown on the same line.
 A line was changed and one or more of the lines below were deleted. A
 combination of ! and _. The sign is shown on the same line.
 
+    ‾
+
+This is used instead of _ in the special case of the first line being removed.
+
 
 ==============================================================================
 3. Options                                                     *signify-options*