diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index 43330b63f9b..7d5aa25016b 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -2892,7 +2892,7 @@ impl u8 {
     }
 
     /// Checks if the value is an ASCII graphic character:
-    /// U+0021 '@' ... U+007E '~'.
+    /// U+0021 '!' ... U+007E '~'.
     ///
     /// # Examples
     ///
diff --git a/src/libstd/ascii.rs b/src/libstd/ascii.rs
index 82e1a3447dc..430c9df396a 100644
--- a/src/libstd/ascii.rs
+++ b/src/libstd/ascii.rs
@@ -245,7 +245,7 @@ pub trait AsciiExt {
     fn is_ascii_punctuation(&self) -> bool { unimplemented!(); }
 
     /// Checks if the value is an ASCII graphic character:
-    /// U+0021 '@' ... U+007E '~'.
+    /// U+0021 '!' ... U+007E '~'.
     /// For strings, true if all characters in the string are
     /// ASCII graphic characters.
     ///
diff --git a/src/libstd_unicode/char.rs b/src/libstd_unicode/char.rs
index b4be4a96911..844ff7a3c12 100644
--- a/src/libstd_unicode/char.rs
+++ b/src/libstd_unicode/char.rs
@@ -1332,7 +1332,7 @@ impl char {
     }
 
     /// Checks if the value is an ASCII graphic character:
-    /// U+0021 '@' ... U+007E '~'.
+    /// U+0021 '!' ... U+007E '~'.
     ///
     /// # Examples
     ///