diff --git a/output/dll/libquicknes.dll b/output/dll/libquicknes.dll
index 939b0cb7f0..a961862827 100644
Binary files a/output/dll/libquicknes.dll and b/output/dll/libquicknes.dll differ
diff --git a/quicknes/bizinterface.cpp b/quicknes/bizinterface.cpp
index cafb3969c1..74e9ab3ac1 100644
--- a/quicknes/bizinterface.cpp
+++ b/quicknes/bizinterface.cpp
@@ -31,7 +31,7 @@ void operator delete(void *p)
 	std::free(p);
 }
 
-#define EXPORT extern "C" __declspec(dllexport)
+#define EXPORT extern "C" __declspec(dllexport) __attribute__((force_align_arg_pointer))
 
 EXPORT void qn_setup_mappers()
 {
diff --git a/quicknes/mingw/Makefile b/quicknes/mingw/Makefile
index 8a28ffb88d..6761074f8a 100644
--- a/quicknes/mingw/Makefile
+++ b/quicknes/mingw/Makefile
@@ -1,7 +1,10 @@
 CXX = g++
-CXXFLAGS = -Wall -DDISABLE_AUTO_FILE -D__LIBRETRO__ -DNDEBUG -I.. -O3 -Wno-multichar -fno-exceptions -fomit-frame-pointer
+CXXFLAGS = -Wall -DDISABLE_AUTO_FILE -D__LIBRETRO__ -DNDEBUG -I.. -O3 -Wno-multichar -fno-exceptions -fomit-frame-pointer -march=pentium4 -mtune=core2 -flto
+# TODO: include these as options in the Makefile
+# -fprofile-generate
+# -fprofile-use
 TARGET = libquicknes.dll
-LDFLAGS = -shared -static-libgcc -static-libstdc++ $(CXXFLAGS)
+LDFLAGS = -shared -static -static-libgcc -static-libstdc++ $(CXXFLAGS)
 RM = rm
 CP = cp