diff --git a/application/helpers/expressions/em_core_helper.php b/application/helpers/expressions/em_core_helper.php
index 1fe6e7549f4..87359356645 100644
--- a/application/helpers/expressions/em_core_helper.php
+++ b/application/helpers/expressions/em_core_helper.php
@@ -1787,9 +1787,12 @@ private function HasSyntaxErrors()
                     break;
             }
         }
-        if ($nesting != 0) {
+        if ($nesting > 0) {
             $this->RDP_AddError(sprintf(self::gT("Missing %s closing right parentheses"), $nesting), null);
         }
+        if ($nesting < 0) {
+            $this->RDP_AddError(sprintf(self::gT("Missing %s closing left parentheses"), abs($nesting)), null);
+        }
         return (count($this->RDP_errs) > 0);
     }