diff --git a/poky/meta/classes/populate_sdk_ext.bbclass b/poky/meta/classes/populate_sdk_ext.bbclass
index e30c492..40b0375 100644
--- a/poky/meta/classes/populate_sdk_ext.bbclass
+++ b/poky/meta/classes/populate_sdk_ext.bbclass
@@ -280,6 +280,8 @@
 
     # Create local.conf
     builddir = d.getVar('TOPDIR')
+    if derivative and os.path.exists(builddir + '/conf/site.conf'):
+        shutil.copyfile(builddir + '/conf/site.conf', baseoutpath + '/conf/site.conf')
     if derivative and os.path.exists(builddir + '/conf/auto.conf'):
         shutil.copyfile(builddir + '/conf/auto.conf', baseoutpath + '/conf/auto.conf')
     if derivative:
@@ -297,6 +299,9 @@
                 return origvalue, op, 0, True
         varlist = ['[^#=+ ]*']
         oldlines = []
+        if os.path.exists(builddir + '/conf/site.conf'):
+            with open(builddir + '/conf/site.conf', 'r') as f:
+                oldlines += f.readlines()
         if os.path.exists(builddir + '/conf/auto.conf'):
             with open(builddir + '/conf/auto.conf', 'r') as f:
                 oldlines += f.readlines()