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-rw-r--r--chap.scm1
1 files changed, 1 insertions, 0 deletions
diff --git a/chap.scm b/chap.scm
index 1766720..dfd3c1f 100644
--- a/chap.scm
+++ b/chap.scm
@@ -22,6 +22,7 @@
;;; section of the string consists of consecutive numeric or
;;; consecutive aphabetic characters.
+(require 'rev4-optional-procedures) ; string-copy
;;@code{(require 'chapter-order)}
;;@ftindex chapter-order