diff --git a/gnu/usr.bin/cc/f77doc/Makefile b/gnu/usr.bin/cc/f77doc/Makefile
index 1dd59de1397b..5e0808d355f5 100644
--- a/gnu/usr.bin/cc/f77doc/Makefile
+++ b/gnu/usr.bin/cc/f77doc/Makefile
@@ -7,6 +7,7 @@
 INFO= g77
 
 MAKEINFOFLAGS+= -I ${GCCDIR}/f -I ${GCCDIR}/doc/include
+MAKEINFOFLAGS+= -D "srcdir src/contrib"
 
 g77.info: g77.texi intdoc.texi ffe.texi invoke.texi news.texi bugs.texi \
     ../doc/include/gpl.texi ../doc/include/fdl.texi ../doc/include/funding.texi