diff --git a/Library/Homebrew/utils/shell.rb b/Library/Homebrew/utils/shell.rb
index 56ea7fd1e6..7799dc1db1 100644
--- a/Library/Homebrew/utils/shell.rb
+++ b/Library/Homebrew/utils/shell.rb
@@ -72,7 +72,7 @@ module Utils
       zsh: "~/.zshrc",
     }.freeze
 
-    UNSAFE_SHELL_CHAR = %r{([^A-Za-z0-9_\-.,:/@\n])}
+    UNSAFE_SHELL_CHAR = %r{([^A-Za-z0-9_\-.,:/@~\n])}
 
     def csh_quote(str)
       # ruby's implementation of shell_escape