diff --git a/pglablib/catalog/PgAttribute.cpp b/pglablib/catalog/PgAttribute.cpp
index bfb4724..3e697d8 100644
--- a/pglablib/catalog/PgAttribute.cpp
+++ b/pglablib/catalog/PgAttribute.cpp
@@ -28,7 +28,7 @@ QString PgAttribute::columnDefinition(const PgDatabaseCatalog &cat) const
 	if (hasdef)
 		sql += " DEFAULT " % defaultValue;
 
-	if (identity != ' ') {
+	if (identity != '\0') {
 		sql += " GENERATED ";
 		if (identity == 'a') sql += "ALWAYS";
 		else if (identity == 'd') sql += "BY DEFAULT";
diff --git a/pglablib/catalog/PgAttribute.h b/pglablib/catalog/PgAttribute.h
index 1e0cd8a..de887b2 100644
--- a/pglablib/catalog/PgAttribute.h
+++ b/pglablib/catalog/PgAttribute.h
@@ -22,7 +22,7 @@ public:
 	int32_t typmod = -1;
 	bool notnull = false;
 	bool hasdef = false;
-	char identity = ' ';
+	char identity = '\0';
 	bool isdropped = false;
 	bool islocal = true;
 	Oid collation = InvalidOid;