diff --git a/meilisearch-error/src/lib.rs b/meilisearch-error/src/lib.rs
index 2e4b50ef6..bdb17ff22 100644
--- a/meilisearch-error/src/lib.rs
+++ b/meilisearch-error/src/lib.rs
@@ -83,6 +83,8 @@ pub enum Code {
 
     DumpAlreadyInProgress,
     DumpProcessFailed,
+
+    MissingContentType,
 }
 
 impl Code {
@@ -154,6 +156,7 @@ impl Code {
             DumpProcessFailed => {
                 ErrCode::internal("dump_process_failed", StatusCode::INTERNAL_SERVER_ERROR)
             }
+            MissingContentType => ErrCode::invalid("missing_content_type", StatusCode::UNSUPPORTED_MEDIA_TYPE),
         }
     }
 
diff --git a/meilisearch-http/src/error.rs b/meilisearch-http/src/error.rs
index bb18ad6f4..bb0b06e27 100644
--- a/meilisearch-http/src/error.rs
+++ b/meilisearch-http/src/error.rs
@@ -9,6 +9,20 @@ use aweb::error::{JsonPayloadError, QueryPayloadError};
 use meilisearch_error::{Code, ErrorCode};
 use serde::{Deserialize, Serialize};
 
+#[derive(Debug, thiserror::Error)]
+pub enum MeilisearchHttpError {
+    #[error("A Content-Type header is missing. Accepted values for the Content-Type header are: \"application/json\", \"application/x-ndjson\", \"test/csv\"")]
+    MissingContentType,
+}
+
+impl ErrorCode for MeilisearchHttpError {
+    fn error_code(&self) -> Code {
+        match self {
+            MeilisearchHttpError::MissingContentType => Code::MissingContentType,
+        }
+    }
+}
+
 #[derive(Debug, Serialize, Deserialize, Clone)]
 #[serde(rename_all = "camelCase")]
 pub struct ResponseError {
diff --git a/meilisearch-http/src/routes/indexes/documents.rs b/meilisearch-http/src/routes/indexes/documents.rs
index 38aa4282f..ca17efad7 100644
--- a/meilisearch-http/src/routes/indexes/documents.rs
+++ b/meilisearch-http/src/routes/indexes/documents.rs
@@ -10,7 +10,7 @@ use serde::Deserialize;
 use serde_json::Value;
 use tokio::sync::mpsc;
 
-use crate::error::ResponseError;
+use crate::error::{MeilisearchHttpError, ResponseError};
 use crate::extractors::authentication::{policies::*, GuardedData};
 use crate::extractors::payload::Payload;
 use crate::routes::IndexParam;
@@ -66,7 +66,7 @@ pub fn configure(cfg: &mut web::ServiceConfig) {
             .route(
                 web::post()
                     .guard(empty_application_type)
-                    .to(HttpResponse::UnsupportedMediaType),
+                    .to(missing_content_type_error),
             )
             .route(web::post().guard(guard_json).to(add_documents_json))
             .route(web::post().guard(guard_ndjson).to(add_documents_ndjson))
@@ -76,7 +76,7 @@ pub fn configure(cfg: &mut web::ServiceConfig) {
             .route(
                 web::put()
                     .guard(empty_application_type)
-                    .to(HttpResponse::UnsupportedMediaType),
+                    .to(missing_content_type_error),
             )
             .route(web::put().guard(guard_json).to(update_documents_json))
             .route(web::put().guard(guard_ndjson).to(update_documents_ndjson))
@@ -93,6 +93,10 @@ pub fn configure(cfg: &mut web::ServiceConfig) {
     );
 }
 
+async fn missing_content_type_error() -> Result<HttpResponse, ResponseError> {
+    Err(MeilisearchHttpError::MissingContentType.into())
+}
+
 pub async fn get_document(
     meilisearch: GuardedData<Public, MeiliSearch>,
     path: web::Path<DocumentParam>,