diff --git a/stepmania/src/archutils/Win32/arch_setup.h b/stepmania/src/archutils/Win32/arch_setup.h
index 890ded463c..ad72bf8c5c 100644
--- a/stepmania/src/archutils/Win32/arch_setup.h
+++ b/stepmania/src/archutils/Win32/arch_setup.h
@@ -5,6 +5,7 @@
 
 #if defined(__MINGW32__)
 #define _WINDOWS // This isn't defined under MinGW
+#define NEED_CSTDLIB_WORKAROUND // Needed for llabs() in MinGW
 #endif
 
 #if defined(_MSC_VER)