1 files changed, 4 insertions, 0 deletions
diff --git a/htdp.f b/htdp.f
index 5f0e024..8786e11 100644
--- a/htdp.f
+++ b/htdp.f
@@ -25,6 +25,10 @@ C  You must change HTDP version and date here, if necessary
 
       HTDP_version = '3.5.0'
       Version_date = 'November 29, 2022'
+      call linkbd     ! require linker to include block data
+      call linkeq     ! require linker to include block data
+      call linkps     ! require linker to include block data
+      call linkvl     ! require linker to include block data
 
 *** Introduce variables for file IDs