diff --git a/backend/cpp/ds4/Makefile b/backend/cpp/ds4/Makefile
index 0a6726976..bca814b1d 100644
--- a/backend/cpp/ds4/Makefile
+++ b/backend/cpp/ds4/Makefile
@@ -1,10 +1,10 @@
 # ds4 backend Makefile.
 #
-# Upstream pin lives below as DS4_VERSION?=599e49d253971451f710cb8323344e789906ed6c
+# Upstream pin lives below as DS4_VERSION?=2606543be7a8c125a32cee37f5d1d85dc78f2fcf
 # (.github/bump_deps.sh) can find and update it - matches the
 # llama-cpp / ik-llama-cpp / turboquant convention.
 
-DS4_VERSION?=599e49d253971451f710cb8323344e789906ed6c
+DS4_VERSION?=2606543be7a8c125a32cee37f5d1d85dc78f2fcf
 DS4_REPO?=https://github.com/antirez/ds4
 
 CURRENT_MAKEFILE_DIR := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))