diff --git a/src/tree/iter.rs b/src/tree/iter.rs
index d812001..0524361 100644
--- a/src/tree/iter.rs
+++ b/src/tree/iter.rs
@@ -88,7 +88,7 @@ impl Node {
     }
 
     /// Returns a mutable iterator over all operators in this tree.
-    pub fn iter_operator_mut(&mut self) -> impl Iterator<Item = &mut Operator> {
+    pub fn iter_operators_mut(&mut self) -> impl Iterator<Item = &mut Operator> {
         OperatorIterMut::new(self)
     }
 }
diff --git a/src/tree/mod.rs b/src/tree/mod.rs
index 5580031..288f62f 100644
--- a/src/tree/mod.rs
+++ b/src/tree/mod.rs
@@ -98,7 +98,7 @@ impl Node {
     /// assert_eq!(iter.next(), None);
     /// ```
     pub fn iter_identifiers_mut(&mut self) -> impl Iterator<Item = &mut String> {
-        self.iter_operator_mut()
+        self.iter_operators_mut()
             .filter_map(|operator| match operator {
                 Operator::VariableIdentifierWrite { identifier }
                 | Operator::VariableIdentifierRead { identifier }
@@ -153,7 +153,7 @@ impl Node {
     /// assert_eq!(iter.next(), None);
     /// ```
     pub fn iter_variable_identifiers_mut(&mut self) -> impl Iterator<Item = &mut String> {
-        self.iter_operator_mut()
+        self.iter_operators_mut()
             .filter_map(|operator| match operator {
                 Operator::VariableIdentifierWrite { identifier }
                 | Operator::VariableIdentifierRead { identifier } => Some(identifier),
@@ -207,7 +207,7 @@ impl Node {
     /// assert_eq!(iter.next(), None);
     /// ```
     pub fn iter_read_variable_identifiers_mut(&mut self) -> impl Iterator<Item = &mut String> {
-        self.iter_operator_mut()
+        self.iter_operators_mut()
             .filter_map(|operator| match operator {
                 Operator::VariableIdentifierRead { identifier } => Some(identifier),
                 _ => None,
@@ -258,7 +258,7 @@ impl Node {
     /// assert_eq!(iter.next(), None);
     /// ```
     pub fn iter_write_variable_identifiers_mut(&mut self) -> impl Iterator<Item = &mut String> {
-        self.iter_operator_mut()
+        self.iter_operators_mut()
             .filter_map(|operator| match operator {
                 Operator::VariableIdentifierWrite { identifier } => Some(identifier),
                 _ => None,
@@ -309,7 +309,7 @@ impl Node {
     /// assert_eq!(iter.next(), None);
     /// ```
     pub fn iter_function_variable_identifiers_mut(&mut self) -> impl Iterator<Item = &mut String> {
-        self.iter_operator_mut()
+        self.iter_operators_mut()
             .filter_map(|operator| match operator {
                 Operator::FunctionIdentifier { identifier } => Some(identifier),
                 _ => None,