diff --git a/src/Functions/runningDifference.h b/src/Functions/runningDifference.h
index 00874272496..db32b5f9a3f 100644
--- a/src/Functions/runningDifference.h
+++ b/src/Functions/runningDifference.h
@@ -46,7 +46,7 @@ private:
     /// It is possible to track value from previous columns, to calculate continuously across all columnss. Not implemented.
 
     template <typename Src, typename Dst>
-    static void process(const PaddedPODArray<Src> & src, PaddedPODArray<Dst> & dst, const NullMap * null_map)
+    static NO_SANITIZE_UNDEFINED void process(const PaddedPODArray<Src> & src, PaddedPODArray<Dst> & dst, const NullMap * null_map)
     {
         size_t size = src.size();
         dst.resize(size);
@@ -76,6 +76,7 @@ private:
             else
             {
                 auto cur = src[i];
+                /// Overflow is Ok.
                 dst[i] = static_cast<Dst>(cur) - prev;
                 prev = cur;
             }
diff --git a/tests/queries/0_stateless/01665_running_difference_ubsan.reference b/tests/queries/0_stateless/01665_running_difference_ubsan.reference
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/tests/queries/0_stateless/01665_running_difference_ubsan.sql b/tests/queries/0_stateless/01665_running_difference_ubsan.sql
new file mode 100644
index 00000000000..fa09502a105
--- /dev/null
+++ b/tests/queries/0_stateless/01665_running_difference_ubsan.sql
@@ -0,0 +1 @@
+SELECT k, d, i FROM (SELECT t.1 AS k, t.2 AS v, runningDifference(v) AS d, runningDifference(cityHash64(t.1)) AS i FROM (SELECT arrayJoin([(NULL, 65535), ('a', 7), ('a', 3), ('b', 11), ('b', 2), ('', -9223372036854775808)]) AS t)) WHERE i = 9223372036854775807;