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-rw-r--r--doc/hackersguide/Makefile.am3
1 files changed, 3 insertions, 0 deletions
diff --git a/doc/hackersguide/Makefile.am b/doc/hackersguide/Makefile.am
index 2b65bfe90..37269eaf0 100644
--- a/doc/hackersguide/Makefile.am
+++ b/doc/hackersguide/Makefile.am
@@ -56,6 +56,9 @@ endif
if HAVE_RSVG
.svg.png:
rsvg -f png $^ $@
+if HAVE_OPTIPNG
+ optipng $@
+endif
else
.svg.png:
if test x"$(fail_if_missing)" = x"yes"; then \