diff --git a/boot/at91bootstrap3/at91bootstrap3.mk b/boot/at91bootstrap3/at91bootstrap3.mk
index 74f08e8..bb6ef09 100644
--- a/boot/at91bootstrap3/at91bootstrap3.mk
+++ b/boot/at91bootstrap3/at91bootstrap3.mk
@@ -65,3 +65,10 @@ $(error No at91bootstrap3 configuration file specified, check your BR2_TARGET_AT
 endif
 endif
 endif
+
+ifeq ($(BR2_TARGET_AT91BOOTSTRAP3_USE_CUSTOM_CONFIG),y)
+at91bootstrap3-update-config: at91bootstrap3-configure
+	cp -f $(AT91BOOTSTRAP3_DIR)/.config $(AT91BOOTSTRAP3_CUSTOM_CONFIG_FILE)
+else
+at91bootstrap3-update-config: ;
+endif
diff --git a/docs/manual/customize-store.txt b/docs/manual/customize-store.txt
index 3eb76ef..6c799ee 100644
--- a/docs/manual/customize-store.txt
+++ b/docs/manual/customize-store.txt
@@ -61,11 +61,11 @@ configuration files easier.
   path specified by +BR2_UCLIBC_CONFIG+.
 * +make ctng-update-config+ saves the crosstool-NG configuration to the
   patch specified by +BR2_TOOLCHAIN_CTNG_CONFIG+.
+* +make at91bootstrap3-update-config+ saves the at91bootstrap3
+  configuration to the path specified by
+  +BR2_TARGET_AT91BOOTSTRAP3_CUSTOM_CONFIG_FILE+.
 * +make barebox-update-defconfig+ saves the barebox configuration to the
   path specified by +BR2_TARGET_BAREBOX_CUSTOM_CONFIG_FILE+.
-* For at91bootstrap3, no helper exists so you
-  have to copy the config file manually to
-  +BR2_TARGET_AT91BOOTSTRAP3_CUSTOM_CONFIG_FILE+.
 
 Creating your own board support
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~