diff --git a/bolt/runtime/hugify.cpp b/bolt/runtime/hugify.cpp
--- a/bolt/runtime/hugify.cpp
+++ b/bolt/runtime/hugify.cpp
@@ -27,7 +27,7 @@
 #ifdef MADV_HUGEPAGE
 /// Check whether the kernel supports THP via corresponding sysfs entry.
 static bool has_pagecache_thp_support() {
-  char buf[256] = {0};
+  char buf[256];
   const char *madviseStr = "always [madvise] never";
 
   int fd = __open("/sys/kernel/mm/transparent_hugepage/enabled",
@@ -35,6 +35,7 @@
   if (fd < 0)
     return false;
 
+  memSet(buf, 0, sizeof(buf));
   size_t res = __read(fd, buf, 256);
   if (res < 0)
     return false;