diff --git a/Makefile b/Makefile
index 734247d..d5e2ac7 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@ URL = http://www.gnu.org/software/groff/
 BRIEF = Typsetting library
 DESC = Groff (GNU troff) is a typesetting system that reads plain text mixed \
 with formatting commands and produces formatted output.
-SNAPVER = 3
+SNAPVER = 4
 
 ARCHIVE := $(PWD)/SRC/$(shell ls SRC|egrep '(bz2|gz|tar|xz)$$'|tail -1)
 TYPE := $(shell file -ib $(ARCHIVE)|cut -d';' -f1|tr -d '\n')
@@ -47,6 +47,7 @@ $(SRCDIR)/config.log: $(SRCDIR)/configure
 	@cd $(SRCDIR); \
 	PAGE=letter ./configure \
 		--prefix=/usr \
+		--docdir=/usr/share/doc/groff \
 		--build=x86_64-snap-linux-gnu \
 		--host=x86_64-snap-linux-gnu \
 		--target=x86_64-snap-linux-gnu