diff --git a/dlls/ntdll/virtual.c b/dlls/ntdll/virtual.c
index d15b49f6fd..14a58d67cb 100644
--- a/dlls/ntdll/virtual.c
+++ b/dlls/ntdll/virtual.c
@@ -1894,15 +1894,23 @@ void virtual_init_threading(void)
  */
 void virtual_get_system_info( SYSTEM_BASIC_INFORMATION *info )
 {
+#ifdef __sun
+    LONG64 phys_pages;
+#else
 #ifdef HAVE_SYSINFO
     struct sysinfo sinfo;
 #endif
+#endif /* __sun */
 
     info->unknown                 = 0;
     info->KeMaximumIncrement      = 0;  /* FIXME */
     info->PageSize                = page_size;
     info->MmLowestPhysicalPage    = 1;
     info->MmHighestPhysicalPage   = 0x7fffffff / page_size;
+#ifdef __sun
+    phys_pages = sysconf( _SC_PHYS_PAGES );
+    info->MmHighestPhysicalPage = max(1, phys_pages);
+#else
 #ifdef HAVE_SYSINFO
     if (!sysinfo(&sinfo))
     {
@@ -1910,6 +1918,7 @@ void virtual_get_system_info( SYSTEM_BASIC_INFORMATION *info )
         info->MmHighestPhysicalPage = max(1, total / page_size);
     }
 #endif
+#endif /* __sun */
     info->MmNumberOfPhysicalPages = info->MmHighestPhysicalPage - info->MmLowestPhysicalPage;
     info->AllocationGranularity   = get_mask(0) + 1;
     info->LowestUserAddress       = (void *)0x10000;
-- 
2.23.0