diff --git a/doc/Makefile.am b/doc/Makefile.am
index 8869c81..dfc5e40 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -61,6 +61,8 @@
 .dia.png:
 	$(DIATOPNG) "$@" $<
 
+man_MANS =
+
 if PIMD
 man_MANS += pimd.8
 endif