diff --git a/milli/src/documents/mod.rs b/milli/src/documents/mod.rs
index a874ac17e..76be61275 100644
--- a/milli/src/documents/mod.rs
+++ b/milli/src/documents/mod.rs
@@ -12,7 +12,10 @@ use bimap::BiHashMap;
 pub use builder::DocumentsBatchBuilder;
 pub use enriched::{EnrichedDocument, EnrichedDocumentsBatchCursor, EnrichedDocumentsBatchReader};
 use obkv::KvReader;
-pub use primary_key::{DocumentIdExtractionError, FieldIdMapper, PrimaryKey, DEFAULT_PRIMARY_KEY};
+pub use primary_key::{
+    validate_document_id_value, DocumentIdExtractionError, FieldIdMapper, PrimaryKey,
+    DEFAULT_PRIMARY_KEY,
+};
 pub use reader::{DocumentsBatchCursor, DocumentsBatchCursorError, DocumentsBatchReader};
 use serde::{Deserialize, Serialize};
 
diff --git a/milli/src/documents/primary_key.rs b/milli/src/documents/primary_key.rs
index 16a95c21f..29f95beaf 100644
--- a/milli/src/documents/primary_key.rs
+++ b/milli/src/documents/primary_key.rs
@@ -60,7 +60,7 @@ impl<'a> PrimaryKey<'a> {
                 Some(document_id_bytes) => {
                     let document_id = serde_json::from_slice(document_id_bytes)
                         .map_err(InternalError::SerdeJson)?;
-                    match validate_document_id_value(document_id)? {
+                    match validate_document_id_value(document_id) {
                         Ok(document_id) => Ok(Ok(document_id)),
                         Err(user_error) => {
                             Ok(Err(DocumentIdExtractionError::InvalidDocumentId(user_error)))
@@ -88,7 +88,7 @@ impl<'a> PrimaryKey<'a> {
                 }
 
                 match matching_documents_ids.pop() {
-                    Some(document_id) => match validate_document_id_value(document_id)? {
+                    Some(document_id) => match validate_document_id_value(document_id) {
                         Ok(document_id) => Ok(Ok(document_id)),
                         Err(user_error) => {
                             Ok(Err(DocumentIdExtractionError::InvalidDocumentId(user_error)))
@@ -159,14 +159,14 @@ fn validate_document_id(document_id: &str) -> Option<&str> {
     }
 }
 
-pub fn validate_document_id_value(document_id: Value) -> Result<StdResult<String, UserError>> {
+pub fn validate_document_id_value(document_id: Value) -> StdResult<String, UserError> {
     match document_id {
         Value::String(string) => match validate_document_id(&string) {
-            Some(s) if s.len() == string.len() => Ok(Ok(string)),
-            Some(s) => Ok(Ok(s.to_string())),
-            None => Ok(Err(UserError::InvalidDocumentId { document_id: Value::String(string) })),
+            Some(s) if s.len() == string.len() => Ok(string),
+            Some(s) => Ok(s.to_string()),
+            None => Err(UserError::InvalidDocumentId { document_id: Value::String(string) }),
         },
-        Value::Number(number) if number.is_i64() => Ok(Ok(number.to_string())),
-        content => Ok(Err(UserError::InvalidDocumentId { document_id: content })),
+        Value::Number(number) if number.is_i64() => Ok(number.to_string()),
+        content => Err(UserError::InvalidDocumentId { document_id: content }),
     }
 }