diff --git a/aws-common-runtime/aws-c-io b/aws-common-runtime/aws-c-io
index 849d0093..99e1ed0a 160000
--- a/aws-common-runtime/aws-c-io
+++ b/aws-common-runtime/aws-c-io
@@ -1 +1 @@
-Subproject commit 849d0093233376a3e2bdca413107d5360d080c61
+Subproject commit 99e1ed0a619209d78ecc366c0756c35699b59f7f