diff --git a/src/utils/circular_vector.hpp b/src/utils/circular_vector.hpp
index 55d3f29..ba185ec 100644
--- a/src/utils/circular_vector.hpp
+++ b/src/utils/circular_vector.hpp
@@ -4,7 +4,7 @@
 class CircularVector
 {
   public:
-    CircularVector(size_t maxSizeIn) : maxSize(maxSizeIn)
+    explicit CircularVector(size_t maxSizeIn) : maxSize(maxSizeIn)
     {}
 
     template <class... Args>