diff --git a/pglab/ColumnTableModel.cpp b/pglab/ColumnTableModel.cpp
index db15c6c..bd175e5 100644
--- a/pglab/ColumnTableModel.cpp
+++ b/pglab/ColumnTableModel.cpp
@@ -48,9 +48,9 @@ QVariant ColumnTableModel::headerData(int section, Qt::Orientation orientation,
 			if (section >= colCount) {
 				const auto &tbl_idx = m_indexes[section - colCount];
 				if (tbl_idx.isprimary)
-					c = "Pri";
+					c = "PK";
 				else if (tbl_idx.isunique)
-					c = "Unq";
+					c = "UIdx";
 				else
 					c = "Idx";
 			}