diff --git a/src/providers/postgres/qgspostgresprovider.cpp b/src/providers/postgres/qgspostgresprovider.cpp
index 228d8e11f756..d5c326196638 100644
--- a/src/providers/postgres/qgspostgresprovider.cpp
+++ b/src/providers/postgres/qgspostgresprovider.cpp
@@ -1048,9 +1048,9 @@ bool QgsPostgresProvider::loadFields()
     QgsField newField = QgsField( fieldName, fieldType, fieldTypeName, fieldSize, fieldPrec, fieldComment, fieldSubType );
 
     QgsFieldConstraints constraints;
-    if ( notNullMap[tableoid][attnum] || ( mPrimaryKeyAttrs.size() == 1 && mPrimaryKeyAttrs[0] == i ) || identityMap[tableoid][attnum] != ' ' )
+    if ( notNullMap[tableoid][attnum] || ( mPrimaryKeyAttrs.size() == 1 && mPrimaryKeyAttrs[0] == i ) )
       constraints.setConstraint( QgsFieldConstraints::ConstraintNotNull, QgsFieldConstraints::ConstraintOriginProvider );
-    if ( uniqueMap[tableoid][attnum] || ( mPrimaryKeyAttrs.size() == 1 && mPrimaryKeyAttrs[0] == i ) || identityMap[tableoid][attnum] != ' ' )
+    if ( uniqueMap[tableoid][attnum] || ( mPrimaryKeyAttrs.size() == 1 && mPrimaryKeyAttrs[0] == i ) )
       constraints.setConstraint( QgsFieldConstraints::ConstraintUnique, QgsFieldConstraints::ConstraintOriginProvider );
     newField.setConstraints( constraints );