diff --git a/configure.ac b/configure.ac
index 605251e..c64613d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -296,7 +296,7 @@ if test x$enable_poppler_glib = xyes; then
 fi
 AM_CONDITIONAL(BUILD_POPPLER_GLIB, test x$enable_poppler_glib = xyes)
 
-GTK_DOC_CHECK([1.0])
+m4_ifdef([GTK_DOC_CHECK],[GTK_DOC_CHECK([1.0])])
 
 dnl
 dnl GDK
diff --git a/glib/reference/Makefile.am b/glib/reference/Makefile.am
index fc99ed1..d8b6fb0 100644
--- a/glib/reference/Makefile.am
+++ b/glib/reference/Makefile.am
@@ -81,7 +81,7 @@ GTKDOC_LIBS=$(top_builddir)/poppler/libpoppler.la	\
 
 
 # This includes the standard gtk-doc make rules, copied by gtkdocize.
-include $(top_srcdir)/gtk-doc.make
+-include $(top_srcdir)/gtk-doc.make
 
 # Other files to distribute
 # e.g. EXTRA_DIST += version.xml.in