diff --git a/SC2148.md b/SC2148.md
index da3d49c..b7ce259 100644
--- a/SC2148.md
+++ b/SC2148.md
@@ -1,4 +1,4 @@
-##  Include a shebang (#!) to specify the shell.
+##  Shebang (#!) missing. Assuming Bash.
 
 ### Problematic code:
 
@@ -11,12 +11,10 @@
 
 ### Rationale:
 
-ShellCheck noticed that your file does not start with a shebang. Shebangs are good for a number of reasons:
+ShellCheck warns about different things for different shells. It uses the shebang to determine which shell to warn for. For the command line client, this can be overridden with `-s`, e.g. `shellcheck -s sh file`. 
 
-* They allow scripts to be executed outside of interactive prompts.
-* They ensure the script is executed by the correct shell.
-* Editors and utilities (including shellcheck) use it to determine the file type.
+If you don't specify the shell type in any way, ShellCheck assumes a default and gives this message.
 
 ### Contraindications
 
-For checking snippets, use `shellcheck -e 2148`. This is the default for [shellcheck.net](http://www.shellcheck.net).
\ No newline at end of file
+None. Just specify the shell type, either in a shebang or as a cli flag.
\ No newline at end of file