diff --git a/libao2/ao_sdl.c b/libao2/ao_sdl.c
index 8d70af73b2..19cba04d72 100644
--- a/libao2/ao_sdl.c
+++ b/libao2/ao_sdl.c
@@ -95,8 +95,8 @@ static int read_buffer(unsigned char* data,int len){
 
 // end ring buffer stuff
 
-#if	 defined(HPUX) || defined(sun) && defined(__svr4__)
-/* setenv is missing on solaris and HPUX */
+#if defined(HPUX) || defined(sgi) || (defined(sun) && defined(__svr4__))
+/* setenv is missing on solaris, IRIX and HPUX */
 static void setenv(const char *name, const char *val, int _xx)
 {
   int len  = strlen(name) + strlen(val) + 2;
diff --git a/libvo/vo_sdl.c b/libvo/vo_sdl.c
index f65087bafa..41759f777d 100644
--- a/libvo/vo_sdl.c
+++ b/libvo/vo_sdl.c
@@ -141,8 +141,8 @@ LIBVO_EXTERN(sdl)
 #include <SDL.h>
 //#include <SDL/SDL_syswm.h>
 
-#if	 defined(HPUX) || defined(sun) && defined(__svr4__)
-/* setenv is missing on solaris and HPUX */
+#if  defined(HPUX) || defined(sgi) || (defined(sun) && defined(__svr4__))
+/* setenv is missing on solaris, IRIX and HPUX */
 static void setenv(const char *name, const char *val, int _xx)
 {
     int len  = strlen(name) + strlen(val) + 2;