diff --git a/Makefile.am b/Makefile.am
index 0ae91d2c3..41cf5b39d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -434,7 +434,7 @@ dist_man7_MANS = $(MAN7:%.txt=%.7)
 
 #  Cause HTML docs to be generated.
 
-doc_DATA = $(MAN1:%.txt=%.1.html) $(MAN3:%.txt=%.3.html) $(MAN7:%.txt=%.7.html)
+html_DATA = $(MAN1:%.txt=%.1.html) $(MAN3:%.txt=%.3.html) $(MAN7:%.txt=%.7.html)
 
 #  Extra files to be cleaned.