diff --git a/le.sh b/le.sh
index e0464afd..47dc7923 100755
--- a/le.sh
+++ b/le.sh
@@ -440,7 +440,7 @@ _initpath() {
     CA_CERT_PATH="$domainhome/ca.cer"
   fi
   if [ -z "$CERT_FULLCHAIN_PATH" ] ; then
-    CERT_FULLCHAIN_PATH="$domainhome/fullchain.pem"
+    CERT_FULLCHAIN_PATH="$domainhome/fullchain.cer"
   fi
 
 }