diff --git a/src/providers/postgres/qgspostgresfeatureiterator.cpp b/src/providers/postgres/qgspostgresfeatureiterator.cpp
index f5d3f86fee2..faecefe86b1 100644
--- a/src/providers/postgres/qgspostgresfeatureiterator.cpp
+++ b/src/providers/postgres/qgspostgresfeatureiterator.cpp
@@ -857,6 +857,11 @@ void QgsPostgresFeatureIterator::getFeatureAttribute( int idx, QgsPostgresResult
       }
       break;
     }
+    case QVariant::LongLong:
+    {
+      v = QgsPostgresProvider::convertValue( fld.type(), fld.subType(), QString::number( mConn->getBinaryInt( queryResult, row, col ) ), fld.typeName() );
+      break;
+    }
     default:
     {
       v = QgsPostgresProvider::convertValue( fld.type(), fld.subType(), queryResult.PQgetvalue( row, col ), fld.typeName() );
diff --git a/src/providers/postgres/qgspostgresprovider.cpp b/src/providers/postgres/qgspostgresprovider.cpp
index 190939afd3d..ef5d5fc6fc3 100644
--- a/src/providers/postgres/qgspostgresprovider.cpp
+++ b/src/providers/postgres/qgspostgresprovider.cpp
@@ -1768,7 +1768,14 @@ QVariant QgsPostgresProvider::minimumValue( int index ) const
     sql = QStringLiteral( "SELECT %1 FROM (%2) foo" ).arg( connectionRO()->fieldExpression( fld ), sql );
 
     QgsPostgresResult rmin( connectionRO()->PQexec( sql ) );
-    return convertValue( fld.type(), fld.subType(), rmin.PQgetvalue( 0, 0 ), fld.typeName() );
+    if ( fld.type() == QVariant::LongLong )
+    {
+      return convertValue( fld.type(), fld.subType(), QString::number( connectionRO()->getBinaryInt( rmin, 0, 0 ) ), fld.typeName() );
+    }
+    else
+    {
+      return convertValue( fld.type(), fld.subType(), rmin.PQgetvalue( 0, 0 ), fld.typeName() );
+    }
   }
   catch ( PGFieldNotFound )
   {
@@ -2033,7 +2040,14 @@ QVariant QgsPostgresProvider::maximumValue( int index ) const
 
     QgsPostgresResult rmax( connectionRO()->PQexec( sql ) );
 
-    return convertValue( fld.type(), fld.subType(), rmax.PQgetvalue( 0, 0 ), fld.typeName() );
+    if ( fld.type() == QVariant::LongLong )
+    {
+      return convertValue( fld.type(), fld.subType(), QString::number( connectionRO()->getBinaryInt( rmax, 0, 0 ) ), fld.typeName() );
+    }
+    else
+    {
+      return convertValue( fld.type(), fld.subType(), rmax.PQgetvalue( 0, 0 ), fld.typeName() );
+    }
   }
   catch ( PGFieldNotFound )
   {
@@ -2070,7 +2084,16 @@ QVariant QgsPostgresProvider::defaultValue( int fieldId ) const
     QgsPostgresResult res( connectionRO()->PQexec( QStringLiteral( "SELECT %1" ).arg( defVal ) ) );
 
     if ( res.result() )
-      return convertValue( fld.type(), fld.subType(), res.PQgetvalue( 0, 0 ), fld.typeName() );
+    {
+      if ( fld.type() == QVariant::LongLong )
+      {
+        return convertValue( fld.type(), fld.subType(), QString::number( connectionRO()->getBinaryInt( res, 0, 0 ) ), fld.typeName() );
+      }
+      else
+      {
+        return convertValue( fld.type(), fld.subType(), res.PQgetvalue( 0, 0 ), fld.typeName() );
+      }
+    }
     else
     {
       pushError( tr( "Could not execute query" ) );