diff --git a/src/common/utils/string.hpp b/src/common/utils/string.hpp
index 74842da..783c5c5 100644
--- a/src/common/utils/string.hpp
+++ b/src/common/utils/string.hpp
@@ -39,7 +39,7 @@ private:
   class entry final {
   public:
     explicit entry(const size_t size = min_buffer_size)
-        : size(size), buffer_(nullptr) {
+        : size_(size), buffer_(nullptr) {
       if (this->size_ < min_buffer_size)
         this->size_ = min_buffer_size;
       this->allocate();