diff --git a/autofiles.sums b/autofiles.sums
index 41bbda8e..2e3b521b 100644
--- a/autofiles.sums
+++ b/autofiles.sums
@@ -1,4 +1,4 @@
-6a272d87172f1f26da483460ab1c5646  configure.ac
+0f7774ac1a4dc4abdbb5b41200cb0300  configure.ac
 d16a8e8947744745887520e331e59e39  m4/ax_random_device.m4
 2cc70ef55adb11e355f6e8c30dcab090  m4/libtool.m4
 064af1799febaa676203302bbf359180  m4/ltoptions.m4
diff --git a/configure b/configure
index ac69889a..b3fac871 100755
--- a/configure
+++ b/configure
@@ -2603,7 +2603,7 @@ fi
 
 
 if test "$AUTOCONF$AUTOHEADER$ACLOCAL$MD5SUM" = "1111"; then
-   if ! md5sum configure.ac m4/* | diff - autofiles.sums; then
+   if ! md5sum configure.ac m4/* | diff -w - autofiles.sums; then
        as_fn_error $? "autofiles are autodated; rerun autogen.sh" "$LINENO" 5
    fi
 fi