diff --git a/debian/patches/features/all/rt/check-series b/debian/patches/features/all/rt/check-series
new file mode 100755
index 000000000..261dd8dc0
--- /dev/null
+++ b/debian/patches/features/all/rt/check-series
@@ -0,0 +1,17 @@
+#! /bin/sh
+
+debian_series="$(mktemp)"
+rt_series="$(mktemp)"
+
+trap 'rm "$debian_series" "$rt_series"' INT QUIT EXIT
+
+# Pick all featureset=rt patches
+grep "featureset=rt$" debian/patches/series/base-extra > "$debian_series"
+
+# Remove comments and empty lines. Drop localversion patch as uname version
+# shouldn't be touched. Reformat to match series format.
+sed -r -e 's/ *#.*//; /^$/d; /^localversion.patch$/d; s,.*,+ features/all/rt/& featureset=rt,' "debian/patches/features/all/rt/series" > "$rt_series"
+
+# removed lines are OK if the rt patch contains fixes that are applied on
+# featureset=none kernels, too.
+diff -u --label "debian/patches/features/all/rt/series" --label "debian/patches/series/base-extra" "$rt_series" "$debian_series"