diff --git a/autoconf/aclocal.m4 b/autoconf/aclocal.m4
index 32db1b3cfee..0a64803e273 100644
--- a/autoconf/aclocal.m4
+++ b/autoconf/aclocal.m4
@@ -6251,13 +6251,13 @@ AC_DEFUN([AC_LINK_USE_R],
 [
   AC_LANG_SAVE
   AC_LANG_C
-  oldcflags=${CFLAGS}
-  CFLAGS="${CFLAGS} -Wl,-R."
-  AC_LINK_IFELSE([int main() { return 0;}],[ac_cv_link_use_r=yes],[ac_cv_link_se_r=no])
-  CFLAGS=${oldcflags}
+  oldcflags="$CFLAGS"
+  CFLAGS="$CFLAGS -Wl,-R."
+  AC_LINK_IFELSE([int main() { return 0; }],[ac_cv_link_use_r=yes],[ac_cv_link_use_r=no])
+  CFLAGS="$oldcflags"
   AC_LANG_RESTORE
-  if test "$ac_cv_link_use_r = yes"
+  if test "$ac_cv_link_use_r" = yes
   then
-    AC_DEFINE([HAVE_LINK_R],[1])
+    AC_DEFINE([HAVE_LINK_R],[1],[Define if you can use -Wl,-R. to pass -R. to the linker, in order to add the current directory to the dynamic linker search path.])
   fi
 ])