diff --git a/src/winpmem/winpmem.cpp b/src/winpmem/winpmem.cpp
index a034b6e1..90729315 100644
--- a/src/winpmem/winpmem.cpp
+++ b/src/winpmem/winpmem.cpp
@@ -64,8 +64,8 @@ int WinPmem::toggle_write_mode() {
 WinPmem::WinPmem():
   suppress_output(FALSE),
   fd_(INVALID_HANDLE_VALUE),
-  out_fd_(INVALID_HANDLE_VALUE),
-  service_name(PMEM_SERVICE_NAME) {
+  out_fd_(INVALID_HANDLE_VALUE) {
+  _tcscpy_s(service_name, PMEM_SERVICE_NAME);
   _tcscpy_s(last_error, TEXT(""));
   max_physical_memory_ = 0;
   }
diff --git a/src/winpmem/winpmem.h b/src/winpmem/winpmem.h
index d8335401..8f02b52c 100644
--- a/src/winpmem/winpmem.h
+++ b/src/winpmem/winpmem.h
@@ -81,7 +81,9 @@ class WinPmem {
 
   // The file handle to the image file.
   HANDLE out_fd_;
-  TCHAR *service_name;
+  
+  // 256: The maximum length of Windows service name string.
+  TCHAR service_name[256];
   TCHAR driver_filename[MAX_PATH];
 
   // This is the maximum size of memory calculated.