diff --git a/app/TransactionRules/Expressions/ActionExpressionLanguageProvider.php b/app/TransactionRules/Expressions/ActionExpressionLanguageProvider.php
index a097377487..b80a0eaf50 100644
--- a/app/TransactionRules/Expressions/ActionExpressionLanguageProvider.php
+++ b/app/TransactionRules/Expressions/ActionExpressionLanguageProvider.php
@@ -60,6 +60,7 @@ class ActionExpressionLanguageProvider implements ExpressionFunctionProviderInte
 
             ExpressionFunction::fromPhp('substr'),
             ExpressionFunction::fromPhp('strlen'),
+            ExpressionFunction::fromPhp('strpos'),
         ];
     }
 }