diff --git a/api/openai/request.go b/api/openai/request.go
index 20413115..2e7bdc76 100644
--- a/api/openai/request.go
+++ b/api/openai/request.go
@@ -27,7 +27,7 @@ func readInput(c *fiber.Ctx, o *options.Option, randomModel bool) (string, *sche
 	input.Cancel = cancel
 	// Get input data from the request body
 	if err := c.BodyParser(input); err != nil {
-		return "", nil, err
+		return "", nil, fmt.Errorf("failed parsing request body: %w", err)
 	}
 
 	modelFile := input.Model
@@ -165,7 +165,7 @@ func updateConfig(config *config.Config, input *schema.OpenAIRequest) {
 
 	// Decode each request's message content
 	index := 0
-	for _, m := range input.Messages {
+	for i, m := range input.Messages {
 		switch content := m.Content.(type) {
 		case string:
 			m.StringContent = content
@@ -175,14 +175,14 @@ func updateConfig(config *config.Config, input *schema.OpenAIRequest) {
 			json.Unmarshal(dat, &c)
 			for _, pp := range c {
 				if pp.Type == "text" {
-					m.StringContent = pp.Text
+					input.Messages[i].StringContent = pp.Text
 				} else if pp.Type == "image_url" {
 					// Detect if pp.ImageURL is an URL, if it is download the image and encode it in base64:
-					base64, err := getBase64Image(pp.ImageURL)
+					base64, err := getBase64Image(pp.ImageURL.URL)
 					if err == nil {
-						m.StringImages = append(m.StringImages, base64) // TODO: make sure that we only return base64 stuff
+						input.Messages[i].StringImages = append(input.Messages[i].StringImages, base64) // TODO: make sure that we only return base64 stuff
 						// set a placeholder for each image
-						m.StringContent = m.StringContent + fmt.Sprintf("[img-%d]", index)
+						input.Messages[i].StringContent = input.Messages[i].StringContent + fmt.Sprintf("[img-%d]", index)
 						index++
 					} else {
 						fmt.Print("Failed encoding image", err)
diff --git a/api/schema/openai.go b/api/schema/openai.go
index 6d276363..899f1b74 100644
--- a/api/schema/openai.go
+++ b/api/schema/openai.go
@@ -56,9 +56,13 @@ type Choice struct {
 }
 
 type Content struct {
-	Type     string `json:"type" yaml:"type"`
-	Text     string `json:"text" yaml:"text"`
-	ImageURL string `json:"image_url" yaml:"image_url"`
+	Type     string     `json:"type" yaml:"type"`
+	Text     string     `json:"text" yaml:"text"`
+	ImageURL ContentURL `json:"image_url" yaml:"image_url"`
+}
+
+type ContentURL struct {
+	URL string `json:"url" yaml:"url"`
 }
 
 type Message struct {
diff --git a/backend/cpp/llama/grpc-server.cpp b/backend/cpp/llama/grpc-server.cpp
index 311f2018..6d5e3f23 100644
--- a/backend/cpp/llama/grpc-server.cpp
+++ b/backend/cpp/llama/grpc-server.cpp
@@ -1974,7 +1974,7 @@ static void params_parse(const backend::ModelOptions* request,
     if (!request->mmproj().empty()) {
     // get the directory of modelfile
       std::string model_dir = params.model.substr(0, params.model.find_last_of("/\\"));
-      params.mmproj = model_dir + request->mmproj();
+      params.mmproj = model_dir + "/"+ request->mmproj();
     }
     //  params.model_alias ??
     params.model_alias =  request->modelfile();