diff --git a/src/BasicChannel.h b/src/BasicChannel.h
index edb38ad..2086048 100644
--- a/src/BasicChannel.h
+++ b/src/BasicChannel.h
@@ -81,7 +81,7 @@ namespace ts {
             ts_always_inline
             static bool permission_granted(const permission::v2::PermissionFlaggedValue& channel_permission_value, const permission::v2::PermissionFlaggedValue& granted_value, bool require_granted_value) {
                 if(!channel_permission_value.has_value || channel_permission_value.value == 0) {
-                    return !require_granted_value || granted_value.has_power();
+                    return granted_value.has_value ? granted_value.has_power() : !require_granted_value;
                 }
                 if(channel_permission_value.value == -1) {
                     return granted_value.value == -1;