diff --git a/kernel.spec b/kernel.spec
index cc30867..20b1115 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -1497,6 +1497,8 @@ rm -f kernel-%{version}-*debug.config
 
 # run oldconfig over the config files (except when noarch)
 if [ "%{_target_cpu}" != "noarch" ]; then
+  ../../scripts/listnewconfig.sh kernel-*-%{_target_cpu}*.config
+  [ $? -eq 1 ] && exit 1 ### fail if there's new config options
   for i in kernel-*-%{_target_cpu}*.config
   do
     mv $i .config
diff --git a/scripts/allarchconfig.sh b/scripts/allarchconfig.sh
index f80c231..169ed3c 100755
--- a/scripts/allarchconfig.sh
+++ b/scripts/allarchconfig.sh
@@ -1,16 +1,4 @@
-#!/bin/sh
-# Run from within a source tree.
-
-for i in configs/kernel-*.config
-do
-  cp -f $i .config
-  Arch=`head -1 .config | cut -b 3-`
-  echo $Arch \($i\)
-  make ARCH=$Arch listnewconfig | grep -E '^CONFIG_' >.newoptions || true;
-  if [ -s .newoptions ]; then
-    cat .newoptions;
-    exit 1;
-  fi;
-  rm -f .newoptions;
-done
+#!/bin/bash
+# run in the kernel source tree
 
+../../scripts/listnewconfig.sh configs/kernel-*.config
diff --git a/scripts/listnewconfig.sh b/scripts/listnewconfig.sh
new file mode 100755
index 0000000..98f74c2
--- /dev/null
+++ b/scripts/listnewconfig.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+# pass in paths to kernel-*.config
+
+for i in "$@"
+do
+  cp -f $i .config
+  Arch=`head -1 .config | cut -b 3-`
+  echo $Arch \($i\)
+  make ARCH=$Arch listnewconfig | grep -E '^CONFIG_' >.newoptions || true;
+  if [ -s .newoptions ]; then
+    cat .newoptions;
+    exit 1;
+  fi;
+  rm -f .newoptions;
+done
+
+exit 0