diff --git a/BasiliskII/src/Unix/sigsegv.cpp b/BasiliskII/src/Unix/sigsegv.cpp
index 91712332..951b4c66 100644
--- a/BasiliskII/src/Unix/sigsegv.cpp
+++ b/BasiliskII/src/Unix/sigsegv.cpp
@@ -55,7 +55,7 @@ using std::list;
 // particular, on ILP32 systems with a 64-bit kernel (HP-UX/ia64?)
 #if defined(HAVE_WIN32_VM)
 // Windows is either ILP32 or LLP64
-#include <BaseTsd.h>
+#include <basetsd.h>
 typedef UINT_PTR sigsegv_uintptr_t;
 #else
 // Other systems are sane enough to follow ILP32 or LP64 models