diff --git a/SC2076.md b/SC2076.md
index 6c8c7d7..9b0aa21 100644
--- a/SC2076.md
+++ b/SC2076.md
@@ -16,4 +16,12 @@ This also means that the problematic code tries to match literal carets and plus
 
 ### Exceptions:
 
-If you do want to match literally just to do a plain substring search, e.g. `[[ $foo =~ "bar" ]]`, you could ignore this message, but consider using a more canonical glob match instead: `[[ $foo = *"bar"* ]]`. 
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+If you do want to match literally just to do a plain substring search, e.g. `[[ $foo =~ "bar" ]]`, you could ignore this message, but consider using a more canonical glob match instead: `[[ $foo = *"bar"* ]]`.
+
+### Compatibility:
+
+* In Bash 3.2 and newer with shopt `compat31` *disabled (the default)*, quoted patterns are literal whereas unquoted patterns are parsed for regex metacharacters.
+* In Bash 3.2 and newer with shopt `compat31` *enabled*, quoted and unquoted patterns match identically.
+* In Bash 3.1 quoted and unquoted patterns match identically.
+
+See http://stackoverflow.com/questions/218156/bash-regex-with-quotes
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