diff --git a/catalog/templates/catalog/course.html b/catalog/templates/catalog/course.html
index baca3ed6..c2e155c8 100644
--- a/catalog/templates/catalog/course.html
+++ b/catalog/templates/catalog/course.html
@@ -216,7 +216,8 @@ <h1 class="d-flex align-items-center gap-2">
                                 </svg>
                             </a>
                         {% endif %}
-                        <a class="btn" title="Télécharger" href="{% url 'document_pdf' document.pk %}"
+                        <a class="btn" title="Télécharger"
+                           href="{% if document.pdf and document.pdf.name %}{% url 'document_pdf' document.pk %}{% else %}{% url 'document_original' document.pk %}{% endif %}"
                            data-turbo="false">
                             <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor"
                                  class="bi bi-download" viewBox="0 0 16 16">
diff --git a/documents/views.py b/documents/views.py
index 89eb4ce6..aa411bc4 100644
--- a/documents/views.py
+++ b/documents/views.py
@@ -5,7 +5,7 @@
 from django.contrib import messages
 from django.contrib.auth.decorators import login_required
 from django.db.models import F
-from django.http import HttpResponse, HttpResponseRedirect
+from django.http import Http404, HttpResponse, HttpResponseRedirect
 from django.shortcuts import get_object_or_404, redirect, render
 from django.urls import reverse
 from django.views.decorators.clickjacking import xframe_options_sameorigin
@@ -254,6 +254,10 @@ def document_vote(request, pk):
 def document_original_file(request, pk):
     document = get_object_or_404(Document, pk=pk)
 
+    # Check if original file exists
+    if not document.original or not document.original.name:
+        raise Http404("Le fichier original n'existe pas pour ce document")
+
     body = document.original.read()
 
     response = HttpResponse(body, content_type="application/octet-stream")
@@ -274,6 +278,11 @@ def document_original_file(request, pk):
 @login_required
 def document_pdf_file(request, pk):
     document = get_object_or_404(Document, pk=pk)
+
+    # Check if PDF file exists
+    if not document.pdf or not document.pdf.name:
+        raise Http404("Le fichier PDF n'existe pas pour ce document")
+
     body = document.pdf.read()
 
     response = HttpResponse(body, content_type="application/pdf")