diff --git a/api/instance/v1/instance_sdk.go b/api/instance/v1/instance_sdk.go
index a284646db..2acc9a002 100644
--- a/api/instance/v1/instance_sdk.go
+++ b/api/instance/v1/instance_sdk.go
@@ -4054,8 +4054,8 @@ func (s *API) updateIP(req *updateIPRequest, opts ...scw.RequestOption) (*Update
 
 type DeleteIPRequest struct {
 	Zone scw.Zone `json:"-"`
-
-	IPID string `json:"-"`
+	// IP the ID or the address of the IP to delete
+	IP string `json:"-"`
 }
 
 // DeleteIP delete IP
@@ -4073,13 +4073,13 @@ func (s *API) DeleteIP(req *DeleteIPRequest, opts ...scw.RequestOption) error {
 		return errors.New("field Zone cannot be empty in request")
 	}
 
-	if fmt.Sprint(req.IPID) == "" {
-		return errors.New("field IPID cannot be empty in request")
+	if fmt.Sprint(req.IP) == "" {
+		return errors.New("field IP cannot be empty in request")
 	}
 
 	scwReq := &scw.ScalewayRequest{
 		Method:  "DELETE",
-		Path:    "/instance/v1/zones/" + fmt.Sprint(req.Zone) + "/ips/" + fmt.Sprint(req.IPID) + "",
+		Path:    "/instance/v1/zones/" + fmt.Sprint(req.Zone) + "/ips/" + fmt.Sprint(req.IP) + "",
 		Headers: http.Header{},
 	}
 
diff --git a/api/instance/v1/instance_utils_test.go b/api/instance/v1/instance_utils_test.go
index 4eb5d2e57..a5b575dc2 100644
--- a/api/instance/v1/instance_utils_test.go
+++ b/api/instance/v1/instance_utils_test.go
@@ -102,7 +102,7 @@ func TestInstanceHelpers(t *testing.T) {
 		// Delete IP
 		err = instanceAPI.DeleteIP(&DeleteIPRequest{
 			Zone: zone,
-			IPID: ipID,
+			IP:   ipID,
 		})
 		testhelpers.AssertNoError(t, err)
 
diff --git a/strcase/bash_arg.go b/strcase/bash_arg.go
index e12874896..89ceeb59e 100644
--- a/strcase/bash_arg.go
+++ b/strcase/bash_arg.go
@@ -3,13 +3,13 @@ package strcase
 import "strings"
 
 var customBashNames = map[string]string{
-	"IPID": "ip-id",
+	"ipid": "ip-id",
 }
 
 // ToBashArg returns the Bash public name of the given string.
 func ToBashArg(s string) string {
 	s = ToPublicGoName(s)
-	if customBashName, exists := customBashNames[s]; exists {
+	if customBashName, exists := customBashNames[strings.ToLower(s)]; exists {
 		return customBashName
 	}
 	for _, initialism := range customInitialisms {