diff --git a/src/common/thread.cpp b/src/common/thread.cpp
index ca0a04c2dd..516a5893ec 100644
--- a/src/common/thread.cpp
+++ b/src/common/thread.cpp
@@ -109,7 +109,7 @@ void SetCurrentThreadName(const char* name) {
         // attempt to set a longer name with ERANGE.
         char buf[16];
         size_t const len = std::min<size_t>(std::strlen(name), sizeof(buf) - 1);
-        std::memcpy(truncated, name, len);
+        std::memcpy(buf, name, len);
         buf[len] = '\0';
         pthread_setname_np(pthread_self(), buf);
     }