diff --git a/doc/Makefile b/doc/Makefile
index 9bc8e3fe..866ef62a 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -20,8 +20,14 @@ endif
 
 override XSLTPROCFLAGS += --stringparam repmgr.version '$(REPMGR_VERSION)'
 
-ALLSGML := $(wildcard $(srcdir)/*.sgml)
 GENERATED_SGML = version.sgml
+ALLSGML := $(wildcard $(srcdir)/*.sgml) $(GENERATED_SGML)
+
+
+version.sgml: $(repmgr_top_builddir)/repmgr_version.h
+	{ \
+	  echo "<!ENTITY repmgrversion \"$(REPMGR_VERSION)\">"; \
+	} > $@
 
 ##
 ## HTML
@@ -30,23 +36,18 @@ GENERATED_SGML = version.sgml
 
 html: html-stamp
 
-html-stamp: stylesheet.xsl repmgr.sgml $(ALLSGML) $(GENERATED_SGML)
+html-stamp: stylesheet.xsl repmgr.sgml $(ALLSGML)
 	$(XMLLINT) $(XMLINCLUDE) --noout --valid $(word 2,$^)
 	$(XSLTPROC) $(XMLINCLUDE) $(XSLTPROCFLAGS) $(XSLTPROC_HTML_FLAGS) $(wordlist 1,2,$^)
 	cp $(srcdir)/stylesheet.css  $(srcdir)/website-docs.css html/
 	touch $@
 
 # single-page HTML
-repmgr.html: stylesheet-html-nochunk.xsl repmgr.sgml $(ALLSGML) $(GENERATED_SGML)
+repmgr.html: stylesheet-html-nochunk.xsl repmgr.sgml $(ALLSGML)
 	$(XMLLINT) $(XMLINCLUDE) --noout --valid $(word 2,$^)
 	$(XSLTPROC) $(XMLINCLUDE) $(XSLTPROCFLAGS) $(XSLTPROC_HTML_FLAGS) -o $@ $(wordlist 1,2,$^)
 
 
-version.sgml: $(repmgr_top_builddir)/repmgr_version.h
-	{ \
-	  echo "<!ENTITY repmgrversion \"$(REPMGR_VERSION)\">"; \
-	} > $@
-
 zip: html
 	cp -r html repmgr-docs-$(REPMGR_VERSION)
 	zip -r repmgr-docs-$(REPMGR_VERSION).zip repmgr-docs-$(REPMGR_VERSION)