diff --git a/stepmania/src/archutils/Darwin/wchar.cpp b/stepmania/src/archutils/Darwin/wchar.cpp
index 3f1d0ba7c3..324512090e 100644
--- a/stepmania/src/archutils/Darwin/wchar.cpp
+++ b/stepmania/src/archutils/Darwin/wchar.cpp
@@ -76,6 +76,12 @@ wchar_t *wmemset(wchar_t *ws , wchar_t wc, size_t n)
 #ifndef wstring
 template class std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >;
 #endif
+/* This has nothing to do with this file, but I might as well put it here
+ * rather than make a new file just for it.
+ */
+#include <iostream>
+template std::basic_istream<char, std::char_traits<char> >&
+    std::basic_istream<char, std::char_traits<char> >::seekg(std::fpos<__mbstate_t>);
 
 #endif