diff --git a/aurweb/models/package_source.py b/aurweb/models/package_source.py
index 59046bbd..4ea1645b 100644
--- a/aurweb/models/package_source.py
+++ b/aurweb/models/package_source.py
@@ -10,7 +10,10 @@ class PackageSource(Base):
     __table__ = schema.PackageSources
     __tablename__ = __table__.name
     __mapper_args__ = {
-        "primary_key": [__table__.c.PackageID]
+        "primary_key": [
+            __table__.c.PackageID,
+            __table__.c.Source
+        ]
     }
 
     Package = relationship(
@@ -26,3 +29,6 @@ class PackageSource(Base):
                 statement="Foreign key PackageID cannot be null.",
                 orig="PackageSources.PackageID",
                 params=("NULL"))
+
+        if not self.Source:
+            self.Source = "/dev/null"
diff --git a/aurweb/routers/packages.py b/aurweb/routers/packages.py
index fc292610..382a096a 100644
--- a/aurweb/routers/packages.py
+++ b/aurweb/routers/packages.py
@@ -201,7 +201,8 @@ async def package(request: Request, name: str) -> Response:
     context["package"] = pkg
 
     # Package sources.
-    context["sources"] = pkg.package_sources
+    context["sources"] = pkg.package_sources.order_by(
+        models.PackageSource.Source.asc()).all()
 
     # Package dependencies.
     dependencies = db.query(models.PackageDependency).join(
diff --git a/templates/partials/packages/package_metadata.html b/templates/partials/packages/package_metadata.html
index e7b1aefb..9f5c8854 100644
--- a/templates/partials/packages/package_metadata.html
+++ b/templates/partials/packages/package_metadata.html
@@ -45,14 +45,14 @@
 </div>
 
 <div id="pkgfiles" class="listing">
-    <h3>Sources ({{ sources.count() }})</h3>
+    <h3>Sources ({{ sources | length }})</h3>
 </div>
 
 <div>
     <ul id="pkgsrcslist">
-        {% for source in sources.all() %}
+        {% for src in sources %}
             <li>
-                <a href="{{ source.Source }}">{{ source.Source }}</a>
+                <a href="{{ src.Source }}">{{ src.Source }}</a>
             </li>
         {% endfor %}
     </ul>