diff --git a/docs/api/Makefile.am b/docs/api/Makefile.am
index d82899150d..2f3f3b4c74 100644
--- a/docs/api/Makefile.am
+++ b/docs/api/Makefile.am
@@ -38,13 +38,15 @@ GENERATED_FILES = spec.html settings-spec.xml
 
 spec.html: $(XMLS) $(OTHER_FILES)
 	$(XSLTPROC) $(top_srcdir)/tools/doc-generator.xsl $(top_srcdir)/introspection/all.xml > $@
+
+api/spec.html: spec.html
 	mkdir -p $(builddir)/html/
-	cp $(builddir)/$@ $(builddir)/html/
+	cp $(builddir)/spec.html $(builddir)/html/
 
 settings-spec.xml: generate-settings-spec $(top_builddir)/libnm-util/libnm-util.la
 	$(builddir)/generate-settings-spec $(builddir)/$@
 
-all: $(GENERATED_FILES)
+all: $(GENERATED_FILES) api/spec.html
 
 ####################################