diff --git a/pkg/yqlib/doc/headers/sort-keys.md b/pkg/yqlib/doc/headers/sort-keys.md
index 932b855b..36327815 100644
--- a/pkg/yqlib/doc/headers/sort-keys.md
+++ b/pkg/yqlib/doc/headers/sort-keys.md
@@ -5,7 +5,7 @@ The Sort Keys operator sorts maps by their keys (based on their string value). T
 Sort is particularly useful for diffing two different yaml documents:
 
 ```bash
-yq eval -i 'sortKeys(..)' file1.yml
-yq eval -i 'sortKeys(..)' file2.yml
+yq eval -i -P 'sort_keys(..)' file1.yml
+yq eval -i -P 'sort_keys(..)' file2.yml
 diff file1.yml file2.yml
 ```
diff --git a/pkg/yqlib/doc/sort-keys.md b/pkg/yqlib/doc/sort-keys.md
index e8f4d6dc..c0a283df 100644
--- a/pkg/yqlib/doc/sort-keys.md
+++ b/pkg/yqlib/doc/sort-keys.md
@@ -5,8 +5,8 @@ The Sort Keys operator sorts maps by their keys (based on their string value). T
 Sort is particularly useful for diffing two different yaml documents:
 
 ```bash
-yq eval -i 'sortKeys(..)' file1.yml
-yq eval -i 'sortKeys(..)' file2.yml
+yq eval -i -P 'sort_keys(..)' file1.yml
+yq eval -i -P 'sort_keys(..)' file2.yml
 diff file1.yml file2.yml
 ```
 
@@ -19,7 +19,7 @@ b: bing
 ```
 then
 ```bash
-yq eval 'sortKeys(.)' sample.yml
+yq eval 'sort_keys(.)' sample.yml
 ```
 will output
 ```yaml
@@ -49,7 +49,7 @@ aParent:
 ```
 then
 ```bash
-yq eval 'sortKeys(..)' sample.yml
+yq eval 'sort_keys(..)' sample.yml
 ```
 will output
 ```yaml
diff --git a/pkg/yqlib/operator_sort_keys_test.go b/pkg/yqlib/operator_sort_keys_test.go
index 130b8019..462771e6 100644
--- a/pkg/yqlib/operator_sort_keys_test.go
+++ b/pkg/yqlib/operator_sort_keys_test.go
@@ -8,7 +8,7 @@ var sortKeysOperatorScenarios = []expressionScenario{
 	{
 		description: "Sort keys of map",
 		document:    `{c: frog, a: blah, b: bing}`,
-		expression:  `sortKeys(.)`,
+		expression:  `sort_keys(.)`,
 		expected: []string{
 			"D0, P[], (doc)::{a: blah, b: bing, c: frog}\n",
 		},
@@ -16,7 +16,7 @@ var sortKeysOperatorScenarios = []expressionScenario{
 	{
 		skipDoc:    true,
 		document:   `{c: frog}`,
-		expression: `sortKeys(.d)`,
+		expression: `sort_keys(.d)`,
 		expected: []string{
 			"D0, P[], (doc)::{c: frog}\n",
 		},
@@ -25,7 +25,7 @@ var sortKeysOperatorScenarios = []expressionScenario{
 		description:    "Sort keys recursively",
 		subdescription: "Note the array elements are left unsorted, but maps inside arrays are sorted",
 		document:       `{bParent: {c: dog, array: [3,1,2]}, aParent: {z: donkey, x: [{c: yum, b: delish}, {b: ew, a: apple}]}}`,
-		expression:     `sortKeys(..)`,
+		expression:     `sort_keys(..)`,
 		expected: []string{
 			"D0, P[], (!!map)::{aParent: {x: [{b: delish, c: yum}, {a: apple, b: ew}], z: donkey}, bParent: {array: [3, 1, 2], c: dog}}\n",
 		},