diff --git a/backend/go/acestep-cpp/Makefile b/backend/go/acestep-cpp/Makefile
index 9b3fd5ae0..383ca8459 100644
--- a/backend/go/acestep-cpp/Makefile
+++ b/backend/go/acestep-cpp/Makefile
@@ -8,7 +8,7 @@ JOBS?=$(shell nproc --ignore=1)
 
 # acestep.cpp version
 ACESTEP_REPO?=https://github.com/ace-step/acestep.cpp
-ACESTEP_CPP_VERSION?=master
+ACESTEP_CPP_VERSION?=5aa065445541094cba934299cd498bbb9fa5c434
 SO_TARGET?=libgoacestepcpp.so
 
 CMAKE_ARGS+=-DBUILD_SHARED_LIBS=OFF