diff --git a/graph/iterator/and_iterator.go b/graph/iterator/and_iterator.go
index c6aedc5..418a469 100644
--- a/graph/iterator/and_iterator.go
+++ b/graph/iterator/and_iterator.go
@@ -293,9 +293,9 @@ func (it *And) Close() error {
 
 	err := it.primaryIt.Close()
 	for _, sub := range it.internalIterators {
-		serr := sub.Close()
-		if serr != nil && err == nil {
-			err = serr
+		_err := sub.Close()
+		if _err != nil && err == nil {
+			err = _err
 		}
 	}
 
diff --git a/graph/iterator/hasa_iterator.go b/graph/iterator/hasa_iterator.go
index 0a6b051..a799bdd 100644
--- a/graph/iterator/hasa_iterator.go
+++ b/graph/iterator/hasa_iterator.go
@@ -263,9 +263,9 @@ func (it *HasA) Close() error {
 	err := it.primaryIt.Close()
 
 	if it.resultIt != nil {
-		err2 := it.resultIt.Close()
+		_err := it.resultIt.Close()
 		if err == nil {
-			err = err2
+			err = _err
 		}
 	}
 
diff --git a/graph/iterator/linksto_iterator.go b/graph/iterator/linksto_iterator.go
index cd65c5c..2a4cd7d 100644
--- a/graph/iterator/linksto_iterator.go
+++ b/graph/iterator/linksto_iterator.go
@@ -200,9 +200,9 @@ func (it *LinksTo) Result() graph.Value {
 func (it *LinksTo) Close() error {
 	err := it.nextIt.Close()
 
-	err2 := it.primaryIt.Close()
-	if err2 != nil && err == nil {
-		err = err2
+	_err := it.primaryIt.Close()
+	if _err != nil && err == nil {
+		err = _err
 	}
 
 	return err
diff --git a/graph/iterator/not_iterator.go b/graph/iterator/not_iterator.go
index fc1e1e3..98232d6 100644
--- a/graph/iterator/not_iterator.go
+++ b/graph/iterator/not_iterator.go
@@ -132,9 +132,9 @@ func (it *Not) NextPath() bool {
 func (it *Not) Close() error {
 	err := it.primaryIt.Close()
 
-	err2 := it.allIt.Close()
-	if err2 != nil && err == nil {
-		err = err2
+	_err := it.allIt.Close()
+	if _err != nil && err == nil {
+		err = _err
 	}
 
 	return err
diff --git a/graph/iterator/or_iterator.go b/graph/iterator/or_iterator.go
index 9cb1660..25524e6 100644
--- a/graph/iterator/or_iterator.go
+++ b/graph/iterator/or_iterator.go
@@ -261,9 +261,9 @@ func (it *Or) Close() error {
 
 	var err error
 	for _, sub := range it.internalIterators {
-		serr := sub.Close()
-		if serr != nil && err == nil {
-			err = serr
+		_err := sub.Close()
+		if _err != nil && err == nil {
+			err = _err
 		}
 	}