diff --git a/packages/xsnap/build.env b/packages/xsnap/build.env
index 47e3656c2c5..441dcd7f77d 100644
--- a/packages/xsnap/build.env
+++ b/packages/xsnap/build.env
@@ -1,4 +1,4 @@
 MODDABLE_URL=https://github.com/agoric-labs/moddable.git
-MODDABLE_COMMIT_HASH=46bbad5b8aa746c50b5f97aee1b1f235ab2a5903
+MODDABLE_COMMIT_HASH=f6c5951fc055e4ca592b9166b9ae3cbb9cca6bf0
 XSNAP_NATIVE_URL=https://github.com/agoric-labs/xsnap-pub
 XSNAP_NATIVE_COMMIT_HASH=056faf8c8930a20659dd4eaa3ebfae3a8b464c7f
diff --git a/packages/xsnap/moddable b/packages/xsnap/moddable
index 46bbad5b8aa..f6c5951fc05 160000
--- a/packages/xsnap/moddable
+++ b/packages/xsnap/moddable
@@ -1 +1 @@
-Subproject commit 46bbad5b8aa746c50b5f97aee1b1f235ab2a5903
+Subproject commit f6c5951fc055e4ca592b9166b9ae3cbb9cca6bf0