diff --git a/getloadavg.c b/getloadavg.c
index 1fe78bd9..1285408b 100644
--- a/getloadavg.c
+++ b/getloadavg.c
@@ -141,7 +141,7 @@ extern int errno;
 #define decstation
 #endif
 
-#if defined(sun) && defined(SVR4)
+#if (defined(sun) && defined(SVR4)) || defined (SOLARIS2)
 #define SUNOS_5
 #endif