diff --git a/src/guide/mutators.md b/src/guide/mutators.md
index 75f7cb05..2fd02ceb 100644
--- a/src/guide/mutators.md
+++ b/src/guide/mutators.md
@@ -58,6 +58,7 @@ The Unwrap* mutator family will unwrap function parameters.
 | UnwrapStrRepeat | `$a = str_repeat('A', 3);` | `$a = 'A';` |
 | UnwrapStrToLower | `$a = strtolower('Hello!');` | `$a = 'Hello!';` |
 | UnwrapStrToUpper | `$a = strtoupper('Hello, world!');` | `$a = 'Hello, world!';` |
+| UnwrapUcFirst | `$a = ucfirst('hello, world!');` | `$a = 'hello, world!';` |
 
 ### Binary Arithmetic
 
diff --git a/src/guide/profiles.md b/src/guide/profiles.md
index 8e648cee..a6b02d2d 100644
--- a/src/guide/profiles.md
+++ b/src/guide/profiles.md
@@ -224,6 +224,7 @@ Contains the following mutators:
 * [UnwrapStrRepeat](/guide/mutators.html#Unwrap-Function)
 * [UnwrapStrToLower](/guide/mutators.html#Unwrap-Function)
 * [UnwrapStrToUpper](/guide/mutators.html#Unwrap-Function)
+* [UnwrapUcFirst](/guide/mutators.html#Unwrap-Function)
 
 ### `@zero_iteration`