diff --git a/src/rocm_smi_main.cc b/src/rocm_smi_main.cc
index 171fc9d8..7ef9217a 100755
--- a/src/rocm_smi_main.cc
+++ b/src/rocm_smi_main.cc
@@ -181,7 +181,7 @@ static bool bdfid_from_path(const std::string in_name, uint64_t *bdfid) {
 
 static uint32_t ConstructBDFID(std::string path, uint64_t *bdfid) {
   assert(bdfid != nullptr);
-  char tpath[256];
+  char tpath[256] = {'\0'};
   ssize_t ret;
 
   ret = readlink(path.c_str(), tpath, 256);