diff --git a/watch.cpp b/watch.cpp
index cfca68e..32853fa 100644
--- a/watch.cpp
+++ b/watch.cpp
@@ -69,8 +69,8 @@
 
     ioPtr = std::make_unique<sdeventplus::source::IO>(
         event, fd, EPOLLIN, [this](sdeventplus::source::IO&, int fd, uint32_t) {
-            const int size = sizeof(struct inotify_event) + NAME_MAX + 1;
-            std::array<char, size> buffer;
+            constexpr int size = sizeof(struct inotify_event) + NAME_MAX + 1;
+            std::array<char, size> buffer{};
             int length = read(fd, buffer.data(), buffer.size());
             if (length >= static_cast<int>(sizeof(struct inotify_event)))
             {