diff --git a/src/os/solaris/solaris_sigar.c b/src/os/solaris/solaris_sigar.c
index ea610f12..22198240 100644
--- a/src/os/solaris/solaris_sigar.c
+++ b/src/os/solaris/solaris_sigar.c
@@ -29,6 +29,7 @@
 #include <sys/proc.h>
 #include <sys/swap.h>
 #include <sys/stat.h>
+#include <sys/systeminfo.h>
 #include <sys/utsname.h>
 #include <dlfcn.h>
 
@@ -2299,6 +2300,8 @@ int sigar_os_sys_info_get(sigar_t *sigar,
 {
     char *vendor_version;
 
+    sysinfo(SI_ARCHITECTURE, sys_info->arch, sizeof(sys_info->arch));
+
     SIGAR_SSTRCPY(sys_info->name, "Solaris");
     SIGAR_SSTRCPY(sys_info->vendor, "Sun Microsystems");