diff --git a/submod.sh b/submod.sh
index c13dca3..f9524a3 100755
--- a/submod.sh
+++ b/submod.sh
@@ -12,7 +12,7 @@ cd -
 #
 # Optional update submodules explicitly
 cd circle-stdlib/libs/circle
-git checkout 4155f43
+git checkout fff3764
 cd -
 cd circle-stdlib/libs/circle-newlib
 #git checkout develop