diff --git a/src/Makefile b/src/Makefile
index e7960dc..de94c82 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -2151,6 +2151,15 @@
 tags TAGS: notags
 	$(TAGPRG) $(TAGS_FILES)
 
+# Build the cscope database.
+# This may search more files than necessary.
+.PHONY: cscope csclean
+csclean:
+	-rm -vf cscope.out
+cscope.out:
+	cscope -bv ./*.[ch] ./*.cpp ./if_perl.xs auto/*.h auto/pathdef.c proto/*.pro xxd/xxd.c
+cscope: csclean cscope.out  ;
+
 # Make a highlight file for types.  Requires Exuberant ctags and awk
 types: types.vim
 types.vim: $(TAGS_FILES)
diff --git a/src/version.c b/src/version.c
index 512950a..5f6995c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1839,
+/**/
     1838,
 /**/
     1837,