For KSDATAFORMAT_SUBTYPE_PCM in src/ao_wmm.c

--- origsrc/libao-1.1.0/configure.ac	2011-02-22 10:25:13.000000000 -0600
+++ src/libao-1.1.0/configure.ac	2013-11-19 23:20:49.921179600 -0600
@@ -228,7 +228,7 @@ AS_IF([test "x$enable_wmm" != "xno"],
 [AC_CHECK_HEADERS([mmsystem.h],
    [
    AC_MSG_CHECKING([waveOut family functions])
-   waveout_old_LIBS="$LIBS"; LIBS="$LIBS -lwinmm"
+   waveout_old_LIBS="$LIBS"; LIBS="$LIBS -lwinmm -Wl,-lksguid"
 dnl Can't use AC_SEARCH_LIBS because symbols are decorated
    AC_LINK_IFELSE([
 #include <windows.h>