diff --git a/pglab/CrudModel.cpp b/pglab/CrudModel.cpp
index b1937ab..06c2f3b 100644
--- a/pglab/CrudModel.cpp
+++ b/pglab/CrudModel.cpp
@@ -267,7 +267,7 @@ const CrudModel::ModifiedRow* CrudModel::getModifiedRow(int row) const
 CrudModel::PKeyValues CrudModel::getPKeyForRow(int row) const
 {
 	PKeyValues values;
-	values.reserve(m_primaryKey->fkey.size());
+	values.reserve(m_primaryKey->key.size());
 
 	auto mod_row = getModifiedRow(row);
 	if (mod_row){