diff --git a/plugins/imap-contacts-suggestions/ImapContactsSuggestions.php b/plugins/imap-contacts-suggestions/ImapContactsSuggestions.php
index 78fc40f65..a39202ace 100644
--- a/plugins/imap-contacts-suggestions/ImapContactsSuggestions.php
+++ b/plugins/imap-contacts-suggestions/ImapContactsSuggestions.php
@@ -29,11 +29,13 @@ class ImapContactsSuggestions implements \RainLoop\Providers\Suggestions\ISugges
 		);
 
 		$aResult = [];
-		foreach ($oImapClient->Fetch(['BODY.PEEK[HEADER.FIELDS (FROM)]'], \implode(',', $aUids), true) as $oFetchResponse) {
-			$oHeaders = new \MailSo\Mime\HeaderCollection($oFetchResponse->GetHeaderFieldsValue());
-			$oFrom = $oHeaders->GetAsEmailCollection(\MailSo\Mime\Enumerations\Header::FROM_, true);
-			foreach ($oFrom as $oMail) {
-				$aResult[] = [$oMail->GetEmail(), $oMail->GetDisplayName()];
+		if ($aUids) {
+			foreach ($oImapClient->Fetch(['BODY.PEEK[HEADER.FIELDS (FROM)]'], \implode(',', $aUids), true) as $oFetchResponse) {
+				$oHeaders = new \MailSo\Mime\HeaderCollection($oFetchResponse->GetHeaderFieldsValue());
+				$oFrom = $oHeaders->GetAsEmailCollection(\MailSo\Mime\Enumerations\Header::FROM_, true);
+				foreach ($oFrom as $oMail) {
+					$aResult[] = [$oMail->GetEmail(), $oMail->GetDisplayName()];
+				}
 			}
 		}