diff --git a/indexer/postgres/column.go b/indexer/postgres/column.go
index aa980d385561..a2e65ea0b6db 100644
--- a/indexer/postgres/column.go
+++ b/indexer/postgres/column.go
@@ -64,6 +64,7 @@ func writeNullability(writer io.Writer, nullable bool) error {
 
 // simpleColumnType returns the postgres column type for the kind for simple types.
 func simpleColumnType(kind schema.Kind) string {
+	//nolint:goconst
 	switch kind {
 	case schema.StringKind:
 		return "TEXT"
diff --git a/indexer/postgres/enum.go b/indexer/postgres/enum.go
index 2f77e0d4a757..7799e23d85f3 100644
--- a/indexer/postgres/enum.go
+++ b/indexer/postgres/enum.go
@@ -17,7 +17,8 @@ func (m *ModuleManager) CreateEnumType(ctx context.Context, conn DBConn, enum sc
 	var res interface{}
 	if err := row.Scan(&res); err != nil {
 		if err != sql.ErrNoRows {
-			return fmt.Errorf("failed to check if enum type %q exists: %v", typeName, err)
+			// use %v instead of %w for go 1.12 compat
+			return fmt.Errorf("failed to check if enum type %q exists: %v", typeName, err) //nolint:errorlint
 		}
 	} else {
 		// the enum type already exists
diff --git a/indexer/postgres/module_mgr.go b/indexer/postgres/module_mgr.go
index dc9edda5cf67..f7ab937a1798 100644
--- a/indexer/postgres/module_mgr.go
+++ b/indexer/postgres/module_mgr.go
@@ -48,7 +48,8 @@ func (m *ModuleManager) InitializeSchema(ctx context.Context, conn DBConn) error
 		m.tables[typ.Name] = tm
 		err := tm.CreateTable(ctx, conn)
 		if err != nil {
-			return fmt.Errorf("failed to create table for %s in module %s: %v", typ.Name, m.moduleName, err)
+			// use %v instead of %w for go 1.12 compat
+			return fmt.Errorf("failed to create table for %s in module %s: %v", typ.Name, m.moduleName, err) //nolint:errorlint
 		}
 	}