diff --git a/app/rainloop/v/1.16.0/app/libraries/RainLoop/Providers/Suggestions/OwnCloudSuggestions.php b/app/rainloop/v/1.16.0/app/libraries/RainLoop/Providers/Suggestions/OwnCloudSuggestions.php
index c27640bd318205bbf426a5d28f26e821291cb8db..f5029140917ab75c680946b9a27bab3070338f5e 100644
--- a/app/rainloop/v/1.16.0/app/libraries/RainLoop/Providers/Suggestions/OwnCloudSuggestions.php
+++ b/app/rainloop/v/1.16.0/app/libraries/RainLoop/Providers/Suggestions/OwnCloudSuggestions.php
@@ -61,6 +61,11 @@ class OwnCloudSuggestions implements \RainLoop\Providers\Suggestions\ISuggestion
 						break;
 					}
 
+					// Skip System users
+					if (isset($aContact['isLocalSystemBook']) && $aContact['isLocalSystemBook']) {
+						continue;
+					}
+
 					$sUid = empty($aContact['UID']) ? '' : $aContact['UID'];
 					if (!empty($sUid))
 					{