diff --git a/docs/content/en/docs/config/grpc/services/appprovider/_index.md b/docs/content/en/docs/config/grpc/services/appprovider/_index.md
index 9adab6c6d6b..b214810c84b 100644
--- a/docs/content/en/docs/config/grpc/services/appprovider/_index.md
+++ b/docs/content/en/docs/config/grpc/services/appprovider/_index.md
@@ -9,7 +9,7 @@ description: >
 # _struct: config_
 
 {{% dir name="iopsecret" type="string" default="" %}}
-The iopsecret used to connect to the wopiserver. [[Ref]](https://github.com/cs3org/reva/tree/master/internal/grpc/services/appprovider/appprovider.go#L59)
+The iopsecret used to connect to the wopiserver. [[Ref]](https://github.com/cs3org/reva/tree/master/internal/grpc/services/appprovider/appprovider.go#L57)
 {{< highlight toml >}}
 [grpc.services.appprovider]
 iopsecret = ""
@@ -17,7 +17,7 @@ iopsecret = ""
 {{% /dir %}}
 
 {{% dir name="wopiurl" type="string" default="" %}}
-The wopiserver's URL. [[Ref]](https://github.com/cs3org/reva/tree/master/internal/grpc/services/appprovider/appprovider.go#L60)
+The wopiserver's URL. [[Ref]](https://github.com/cs3org/reva/tree/master/internal/grpc/services/appprovider/appprovider.go#L58)
 {{< highlight toml >}}
 [grpc.services.appprovider]
 wopiurl = ""
diff --git a/internal/grpc/services/appprovider/appprovider.go b/internal/grpc/services/appprovider/appprovider.go
index 6f41a9f6259..cca7bd89c32 100644
--- a/internal/grpc/services/appprovider/appprovider.go
+++ b/internal/grpc/services/appprovider/appprovider.go
@@ -22,13 +22,11 @@ import (
 	"bytes"
 	"context"
 	"encoding/json"
-	"errors"
 	"fmt"
 	"io/ioutil"
 	"net/http"
 	"net/url"
 	"path"
-	"strconv"
 	"strings"
 	"time"
 
@@ -134,7 +132,7 @@ func (s *service) getWopiAppEndpoints(ctx context.Context) (map[string]interface
 	}
 	defer appsRes.Body.Close()
 	if appsRes.StatusCode != http.StatusOK {
-		return nil, errors.New("Request to WOPI server returned " + string(appsRes.StatusCode))
+		return nil, fmt.Errorf("Request to WOPI server returned %d", appsRes.StatusCode)
 	}
 	appsBody, err := ioutil.ReadAll(appsRes.Body)
 	if err != nil {
@@ -201,7 +199,7 @@ func (s *service) OpenFileInAppProvider(ctx context.Context, req *providerpb.Ope
 
 	if openRes.StatusCode != http.StatusOK {
 		res := &providerpb.OpenFileInAppProviderResponse{
-			Status: status.NewInvalid(ctx, "appprovider: error performing open request to WOPI, status code: "+strconv.Itoa(openRes.StatusCode)),
+			Status: status.NewInvalid(ctx, fmt.Sprintf("appprovider: error performing open request to WOPI, status code: %d", openRes.StatusCode)),
 		}
 		return res, nil
 	}