correctly differentiate between solaris and SunOS

diff --git a/src/sim/headers/sim.h b/src/sim/headers/sim.h
index 7a81f7c..99ffbe0 100644 (file)
--- a/src/sim/headers/sim.h
+++ b/src/sim/headers/sim.h
@@ -111,7 +111,7 @@
 #endif
 
 #ifdef sun
-#ifdef SOLARIS2
+#ifdef __SVR4
 #include <sys/systeminfo.h>
 #else
 #include <sys/vadvise.h>