diff --git a/ext/win32ole/win32ole_error.h b/ext/win32ole/win32ole_error.h
index 5359646ff1..e0eee0ecf9 100644
--- a/ext/win32ole/win32ole_error.h
+++ b/ext/win32ole/win32ole_error.h
@@ -2,7 +2,7 @@
 #define WIN32OLE_ERROR_H 1
 
 VALUE eWIN32OLERuntimeError;
-void ole_raise(HRESULT hr, VALUE ecs, const char *fmt, ...);
+NORETURN(PRINTF_ARGS(void ole_raise(HRESULT hr, VALUE ecs, const char *fmt, ...), 3, 4));
 void Init_win32ole_error(void);
 
 #endif