diff --git a/base/mpfr/mpfr.conf b/base/mpfr/mpfr.conf
index fb018faf8..9e4575217 100644
--- a/base/mpfr/mpfr.conf
+++ b/base/mpfr/mpfr.conf
@@ -2,7 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../mpfr/mpfr.conf
-# Copyright (C) 2006 - 2009 The OpenSDE Project
+# Copyright (C) 2006 - 2012 The OpenSDE Project
 #
 # More information can be found in the files COPYING and README.
 #
@@ -23,6 +23,6 @@
 var_append patchfiles ' ' "$(match_source_file -p '.*\.patch')"
 
 if atstage toolchain; then
-	var_append extraconfopt ' ' '--with-gmp-include=$root/$includedir'
-	var_append extraconfopt ' ' '--with-gmp-lib=$root/$libdir'
+	var_append extraconfopt ' ' "--with-gmp-include=$( pkgprefix -r includedir gmp )"
+	var_append extraconfopt ' ' "--with-gmp-lib=$( pkgprefix -r libdir gmp )"
 fi