diff --git a/ChangeLog b/ChangeLog
index e86f95237..5549c4cfd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2009-06-16  Pavel Roskin  <proski@gnu.org>
+
+	* configure.ac: Avoid '==' in test command, it's not portable.
+
 2009-06-16  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	Probe command
diff --git a/configure.ac b/configure.ac
index b0f7bb728..371c32d03 100644
--- a/configure.ac
+++ b/configure.ac
@@ -164,7 +164,7 @@ AC_CHECK_SIZEOF(void *)
 AC_CHECK_SIZEOF(long)
 
 grub_apple_cc
-if test x$grub_cv_apple_cc == xyes ; then
+if test x$grub_cv_apple_cc = xyes ; then
   CFLAGS="$CFLAGS -DAPPLE_CC=1 -fnested-functions"
   ASFLAGS="$ASFLAGS -DAPPLE_CC=1"
 fi
@@ -273,7 +273,7 @@ if test "x$TARGET_CFLAGS" = x; then
 fi
 
 grub_apple_target_cc
-if test x$grub_cv_apple_target_cc == xyes ; then
+if test x$grub_cv_apple_target_cc = xyes ; then
   TARGET_CFLAGS="$TARGET_CFLAGS -DAPPLE_CC=1 -fnested-functions"
   CFLAGS="$CFLAGS -DAPPLE_CC=1 -fnested-functions"
   TARGET_ASFLAGS="$TARGET_ASFLAGS -DAPPLE_CC=1"