diff --git a/doc/using/overlays.xml b/doc/using/overlays.xml
index 9ffbb4edd98..8bda235d43d 100644
--- a/doc/using/overlays.xml
+++ b/doc/using/overlays.xml
@@ -236,10 +236,11 @@ self: super:
 {
   blas = super.blas.override {
     blasProvider = self.mkl;
-  }
+  };
+
   lapack = super.lapack.override {
     lapackProvider = self.mkl;
-  }
+  };
 }
 </programlisting>
      <para>