diff --git a/compat/msvc.h b/compat/msvc.h
index 29a8ce82043..04b4750b87b 100644
--- a/compat/msvc.h
+++ b/compat/msvc.h
@@ -18,6 +18,8 @@
 
 #undef ERROR
 
+typedef int sigset_t;
+
 #include "compat/mingw.h"
 
 #endif