diff --git a/vidix/drivers/radeon_vid.c b/vidix/drivers/radeon_vid.c
index ccda9d8438..a5dd95d647 100644
--- a/vidix/drivers/radeon_vid.c
+++ b/vidix/drivers/radeon_vid.c
@@ -1083,6 +1083,9 @@ int vixInit( void )
       printf(RADEON_MSG" Workarounding buggy Rage Mobility M3 (0 vs. 8MB ram)\n");
       radeon_ram_size = 8192*1024;
   }
+#endif
+#ifdef WIN32
+  if(radeon_ram_size > 16*1024*1024)radeon_ram_size=16*1024*1024;
 #endif
   if((radeon_mem_base = map_phys_mem(pci_info.base0,radeon_ram_size))==(void *)-1) return ENOMEM;
   memset(&besr,0,sizeof(bes_registers_t));