diff --git a/exposed-core/src/main/kotlin/org/jetbrains/exposed/sql/Table.kt b/exposed-core/src/main/kotlin/org/jetbrains/exposed/sql/Table.kt
index b388721acf..56981b6b52 100644
--- a/exposed-core/src/main/kotlin/org/jetbrains/exposed/sql/Table.kt
+++ b/exposed-core/src/main/kotlin/org/jetbrains/exposed/sql/Table.kt
@@ -539,10 +539,8 @@ open class Table(name: String = ""): ColumnSet(), DdlAware {
     }
 
     internal fun primaryKeyConstraint(): String? {
-        var pkey = columns.filter { it.indexInPK != null }.sortedWith(compareBy({ !it.columnType.isAutoInc }, { it.indexInPK }))
-        if (pkey.isEmpty()) {
-            pkey = columns.filter { it.columnType.isAutoInc }
-        }
+        val pkey = columns.filter { it.indexInPK != null }.sortedWith(compareBy({ !it.columnType.isAutoInc }, { it.indexInPK }))
+
         if (pkey.isNotEmpty()) {
             val tr = TransactionManager.current()
             val constraint = tr.db.identifierManager.cutIfNecessaryAndQuote("pk_$tableName")