diff --git a/python/templates/SIOBlock.cc.jinja2 b/python/templates/SIOBlock.cc.jinja2
index 025e24489..51973b9f9 100644
--- a/python/templates/SIOBlock.cc.jinja2
+++ b/python/templates/SIOBlock.cc.jinja2
@@ -41,8 +41,9 @@ void {{ block_class }}::read(sio::read_device& device, sio::version_type version
 
 {% if VectorMembers %}
   if (not m_subsetColl) {
+    bool found;
 {% for member in VectorMembers %}
-    bool found = false;
+    found = false;
     for (const auto& [first, second] : *m_buffers.vectorMembers) {
       if (first == "{{ member.full_type }}") {
         found = true;