diff --git a/configure.ac b/configure.ac
index 2e1d3e1..92c46bc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -428,6 +428,14 @@ AC_ARG_VAR([OFFICE_HOME], [Libreoffice home])
 AC_ARG_VAR([OO_SDK_HOME], [Libreoffice SDK home])
 AC_ARG_VAR([OO_SDK_URE_HOME], [Libreoffice URE home])
 
+if test "_$OFFICE_HOME" == "_" ; then
+	OFFICE_HOME=$libdir/libreoffice
+fi
+
+if test "_$OO_SDK_HOME" == "_" ; then
+	OO_SDK_HOME=$OFFICE_HOME/sdk
+fi
+
 if test "_$OO_SDK_URE_HOME" == "_" ; then
 	OO_SDK_URE_HOME=$OFFICE_HOME/ure
 fi
--
libgit2 0.21.2