--- /dev/null
+Fixes a typo in Makefile.comm
+
+Upstream fix:
+http://lists.gnu.org/archive/html/bug-groff/2011-01/msg00002.html
+
+diff -ur groff-1.21.old/Makefile.comm groff-1.21/Makefile.comm
+--- groff-1.21.old/Makefile.comm 2010-12-31 08:33:08.000000000 +0100
++++ groff-1.21/Makefile.comm 2011-01-21 16:19:59.762069900 +0100
+@@ -21,7 +21,7 @@
+ #
+ INCLUDES=-I. -I$(srcdir) \
+ -I$(top_builddir)/src/include -I$(top_srcdir)/src/include \
+- -I$(tob_builddir)/src/libs/gnulib/lib
++ -I$(top_builddir)/src/libs/gnulib/lib
+ ALL_CCFLAGS=$(INCLUDES) $(CCDEFINES) $(CCFLAGS) $(CPPFLAGS)
+ COMPILE.cpp=$(CCC) $(ALL_CCFLAGS) -c
+ ALL_CFLAGS=$(INCLUDES) $(CDEFINES) $(CFLAGS) $(CPPFLAGS)