diff --git a/Common-Errors.md b/Common-Errors.md
index 43083d6..55eca24 100644
--- a/Common-Errors.md
+++ b/Common-Errors.md
@@ -34,6 +34,9 @@ Your settings.general.json file is likely missing a comma after one of your sett
 ### Expected keyword (True, False, and, or) but found...
 This means you are using a buy/sell FORMULA in your PT settings, but the logic of your formula is incorrect.  Please ask on the PT discord to make sure your formula is correct.  If it is, but you still get this error be sure you are using spaces between all your arguments:  eg., "(A  &&  B)  ||  (A  &&  C)"
 
+### Expected/Missing parenthesis 
+See above
+
 ### Empty expression
 This can occur when you are using a buy/sell FORMULA in your PT settings and a negation symbol before one of the strategy labels.  For example, (A && B && !C).  For PTM to correctly parse this formula, the strategy with negation should be enclosed in parenthesis like this:  (A && B && (!C))