diff --git a/Userland/Libraries/LibSQL/Forward.h b/Userland/Libraries/LibSQL/Forward.h
index 41104c72b5..2569fc65d0 100644
--- a/Userland/Libraries/LibSQL/Forward.h
+++ b/Userland/Libraries/LibSQL/Forward.h
@@ -24,9 +24,11 @@ class Delete;
 class DropTable;
 class ErrorExpression;
 class ErrorStatement;
+class ExistsExpression;
 class Expression;
 class GroupByClause;
 class InChainedExpression;
+class InSelectionExpression;
 class InTableExpression;
 class InvertibleNestedDoubleExpression;
 class InvertibleNestedExpression;