diff --git a/ChangeLog b/ChangeLog
index ff4e81e61d2b..9f670447c5fc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-09-03  Richard Guenther  <rguenther@suse.de>
+
+	* configure.ac: Always pass -DCLOOG_PPL_BACKEND to the
+	cloog test.
+	* configure: Re-generate.
+
 2008-09-03  Hari Sandanagobalane  <hariharan@picochip.com>
 
 	Add picoChip port.
diff --git a/configure b/configure
index 52718c2dd03e..6c70275f8527 100755
--- a/configure
+++ b/configure
@@ -4950,7 +4950,7 @@ rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
 CFLAGS="$saved_CFLAGS"
 
 saved_CFLAGS="$CFLAGS"
-CFLAGS="$CFLAGS $clooginc $gmpinc $pplinc"
+CFLAGS="$CFLAGS $clooginc -DCLOOG_PPL_BACKEND $gmpinc $pplinc"
 
 echo "$as_me:$LINENO: checking for correct version of CLooG" >&5
 echo $ECHO_N "checking for correct version of CLooG... $ECHO_C" >&6
diff --git a/configure.ac b/configure.ac
index 1e6e37428384..9d25cd2051f5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1386,7 +1386,7 @@ choke me
 CFLAGS="$saved_CFLAGS"
 
 saved_CFLAGS="$CFLAGS"
-CFLAGS="$CFLAGS $clooginc $gmpinc $pplinc"
+CFLAGS="$CFLAGS $clooginc -DCLOOG_PPL_BACKEND $gmpinc $pplinc"
 
 AC_MSG_CHECKING([for correct version of CLooG])
 AC_TRY_COMPILE([#include "cloog/cloog.h"],[