diff --git a/src/windows/WslcSDK/wslcsdk.cpp b/src/windows/WslcSDK/wslcsdk.cpp
index 1d7d80cdb..22d158598 100644
--- a/src/windows/WslcSDK/wslcsdk.cpp
+++ b/src/windows/WslcSDK/wslcsdk.cpp
@@ -31,7 +31,7 @@ constexpr uint32_t s_DefaultMemoryMB = 2000;
 // Maximum value per use with HVSOCKET_CONNECT_TIMEOUT_MAX
 constexpr ULONG s_DefaultBootTimeout = 300000;
 // Default to 1 GB
-constexpr UINT64 s_DefaultStorageSize = 1000 * 1000 * 1000;
+constexpr UINT64 s_DefaultStorageSize = 1000ULL * 1000 * 1000 * 1000;
 
 #define WSLC_FLAG_VALUE_ASSERT(_wlsc_name_, _wslc_name_) \
     static_assert(_wlsc_name_ == _wslc_name_, "Flag values differ: " #_wlsc_name_ " != " #_wslc_name_);