diff --git a/Makefile.onelib b/Makefile.onelib
index f6eab33..2172705 100644
--- a/Makefile.onelib
+++ b/Makefile.onelib
@@ -41,7 +41,7 @@ BINT_OBJ=$(MCL_DIR)/$(OBJ_DIR)/bint$(BIT).o
 ifeq ($(CPU),x86-64)
   _ARCH=amd64
   MSM=msm_avx
-  MCL_MSM?=0
+  MCL_MSM?=1
 endif
 ifeq ($(CPU),aarch64)
   _ARCH=arm64
diff --git a/mcl b/mcl
index a026d3a..3628423 160000
--- a/mcl
+++ b/mcl
@@ -1 +1 @@
-Subproject commit a026d3ae805a7407286cc033d57265e3f028d089
+Subproject commit 3628423dc56d84a84342a63416c5cebd26defbb9