diff --git a/support/hololens/ServoApp/strutils.h b/support/hololens/ServoApp/strutils.h
index 22198332c90..4ebf8170075 100644
--- a/support/hololens/ServoApp/strutils.h
+++ b/support/hololens/ServoApp/strutils.h
@@ -13,7 +13,7 @@ std::wstring format(const std::wstring &txt, Args... args) {
   auto ptr = new wchar_t[size];
   swprintf(ptr, size, txt.c_str(), args...);
   auto wstr = std::wstring(ptr);
-  delete ptr;
+  delete[] ptr;
   return wstr;
 }