diff --git a/SheepShaver/Makefile b/SheepShaver/Makefile
index 85d82c05..18ad6ad0 100644
--- a/SheepShaver/Makefile
+++ b/SheepShaver/Makefile
@@ -64,8 +64,8 @@ links:
 	       Unix/sys_unix.cpp Unix/timer_unix.cpp Unix/xpram_unix.cpp \
 	       Unix/sigsegv.h Unix/sigsegv.cpp Unix/vm_alloc.h Unix/vm_alloc.cpp \
 	       Unix/semaphore.h Unix/posix_sem.cpp Unix/video_vosf.h Unix/video_blit.h \
-	       Unix/video_blit.cpp Unix/config.sub Unix/config.guess \
-	       Unix/keycodes Unix/tunconfig Unix/clip_unix.cpp Unix/m4 \
+	       Unix/video_blit.cpp Unix/config.sub Unix/config.guess Unix/m4 \
+	       Unix/keycodes Unix/tunconfig Unix/clip_unix.cpp Unix/Irix/audio_irix.cpp \
 	       Unix/Linux/scsi_linux.cpp Unix/Linux/NetDriver Unix/ether_unix.cpp \
 	       Unix/Darwin/lowmem.c Unix/Darwin/pagezero.c Unix/Darwin/testlmem.sh \
 	       dummy/audio_dummy.cpp dummy/clip_dummy.cpp dummy/serial_dummy.cpp \
diff --git a/SheepShaver/src/Unix/configure.ac b/SheepShaver/src/Unix/configure.ac
index 9ab56bcc..c4fd53f5 100644
--- a/SheepShaver/src/Unix/configure.ac
+++ b/SheepShaver/src/Unix/configure.ac
@@ -125,6 +125,7 @@ AC_SUBST(MONSRCS)
 
 dnl Checks for libraries.
 AC_CHECK_LIB(posix4, sem_init)
+AC_CHECK_LIB(m, cos)
 
 dnl Do we need SDL?
 WANT_SDL=no
@@ -491,6 +492,12 @@ darwin*)
     EXTFSSRC=../MacOSX/extfs_macosx.mm
   fi
   ;;
+irix*)
+  ETHERSRC=ether_unix.cpp
+  AUDIOSRC=Irix/audio_irix.cpp
+  LIBS="$LIBS -laudio"
+  WANT_ESD=no
+  ;;
 esac
 
 dnl Is the slirp library supported?