diff --git a/mollom.install b/mollom.install
index b2cba5e..94034f6 100644
--- a/mollom.install
+++ b/mollom.install
@@ -1108,3 +1108,12 @@ function mollom_update_7209() {
   }
 }
 
+/**
+ * Disable minimum log severity threshold for existing sites.
+ */
+function mollom_update_7210() {
+  if (variable_get('mollom_log_minimum_severity', NULL) === NULL) {
+    variable_set('mollom_log_minimum_severity', WATCHDOG_INFO);
+  }
+}
+