diff --git a/debian/changelog b/debian/changelog
index 5ac2bd9d0..28ecb0437 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -4,8 +4,8 @@ linux (4.18~rc5-1~exp2) UNRELEASED; urgency=medium
   * [arm64] enable RTC_DRV_PCF8563 for Odroid-C2
 
   [ Romain Perier ]
-  * [armhf] add the rt featureset, which adds support for PREEMPT_RT
-    (Closes #719547)
+  * [armhf, arm64] add the rt featureset, which adds support for
+    PREEMPT_RT (Closes #719547)
 
  -- Uwe Kleine-König <ukleinek@debian.org>  Sat, 21 Jul 2018 16:52:01 +0200
 
diff --git a/debian/config/arm64/defines b/debian/config/arm64/defines
index 4a34a7ed1..bfbbc4f7e 100644
--- a/debian/config/arm64/defines
+++ b/debian/config/arm64/defines
@@ -2,6 +2,7 @@
 kernel-arch: arm64
 featuresets:
  none
+ rt
 
 [build]
 debug-info: true
diff --git a/debian/config/arm64/rt/defines b/debian/config/arm64/rt/defines
new file mode 100644
index 000000000..fdea40cbc
--- /dev/null
+++ b/debian/config/arm64/rt/defines
@@ -0,0 +1,3 @@
+[base]
+flavours:
+ arm64