Fixed FreeBSD build.

diff --git a/docs/Makefile.am b/docs/Makefile.am
index 71832b50154eda1f7e9d213ddae1cef8f8d7b96f..ee4e075c3ad9ddf8ba7e200005fea3e143cf055f 100644 (file)
--- a/docs/Makefile.am
+++ b/docs/Makefile.am
@@ -9,8 +9,10 @@ icinga2doc_DATA = \
        icinga2-config.html \
        icinga2-intro.html
 
-%.html: %.txt
-       asciidoc -a toc -a numbered $^
+.SUFFIXES = .html .txt
+
+.txt.html:
+       asciidoc -a toc -a numbered $<
 
 clean:
        rm -f $(icinga2doc_DATA)