diff --git a/FHEM/93_DbLog.pm b/FHEM/93_DbLog.pm
index 874b6f773..8671044c5 100644
--- a/FHEM/93_DbLog.pm
+++ b/FHEM/93_DbLog.pm
@@ -1334,7 +1334,7 @@ sub DbLog_reduceLog($@) {
     
     if ($hash->{DBMODEL} eq 'SQLITE')        { $cmd = "datetime('now', '-$a[2] days')"; }
     elsif ($hash->{DBMODEL} eq 'MYSQL')      { $cmd = "DATE_SUB(CURDATE(),INTERVAL $a[2] DAY)"; }
-    elsif ($hash->{DBMODEL} eq 'POSTGRESQL') { $cmd = "NOW() - INTERVAL '$a[2] DAY"; }
+    elsif ($hash->{DBMODEL} eq 'POSTGRESQL') { $cmd = "NOW() - INTERVAL '$a[2]' DAY"; }
     else { $ret = 'Unknown database type.'; }
     
     if ($cmd) {