diff --git a/HMCLauncher/HMCL/main.cpp b/HMCLauncher/HMCL/main.cpp
index 5f0c1b1da..ea6a097c7 100644
--- a/HMCLauncher/HMCL/main.cpp
+++ b/HMCLauncher/HMCL/main.cpp
@@ -6,6 +6,11 @@
 
 Version J8(TEXT("8"));
 
+extern "C" {
+  _declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001;
+  _declspec(dllexport) DWORD AmdPowerXpressRequestHighPerformance = 0x00000001;
+}
+
 void RawLaunchJVM(const std::wstring &javaPath, const std::wstring &workdir,
                   const std::wstring &jarPath) {
   if (MyCreateProcess(