1 files changed, 2 insertions, 0 deletions
diff --git a/initvl.f b/initvl.f
index 50310b6..16854a3 100644
--- a/initvl.f
+++ b/initvl.f
@@ -1,3 +1,5 @@
+      subroutine linkvl ! require linker to include block data
+      end subroutine
       BLOCK DATA INITVL
       IMPLICIT DOUBLE PRECISION (A-H, O-Z)
       IMPLICIT INTEGER*4 (I-N)