diff --git a/microscript/ILibDuktape_Commit.h b/microscript/ILibDuktape_Commit.h
index 25b54a4..52b85fe 100644
--- a/microscript/ILibDuktape_Commit.h
+++ b/microscript/ILibDuktape_Commit.h
@@ -1,3 +1,5 @@
 // This file is auto-generated, any edits may be overwritten 
-#define SOURCE_COMMIT_DATE "2019-May-12 21:39:02-0700"  
-#define SOURCE_COMMIT_HASH "d0fb36d10bc2bdf6822629daa098b07a90730e88"  
+#define SOURCE_COMMIT_DATE "2019-Nov-26 11:09:12-0800"  
+#define SOURCE_COMMIT_DATE "2019-Nov-26 11:09:12-0800"  
+#define SOURCE_COMMIT_HASH "170536b267edea4ab1c67a6fb93c4a4a723d5470"  
+#define SOURCE_COMMIT_HASH "170536b267edea4ab1c67a6fb93c4a4a723d5470"  
diff --git a/microscript/ILibDuktape_HECI.c b/microscript/ILibDuktape_HECI.c
index fd5f15c..0c0236f 100644
--- a/microscript/ILibDuktape_HECI.c
+++ b/microscript/ILibDuktape_HECI.c
@@ -795,6 +795,8 @@ void ILibDuktape_HECI_NextIoctl(ILibQueue q);
 BOOL ILibDuktape_HECI_IoctlHandler(HANDLE h, ILibWaitHandle_ErrorStatus errors, void *user)
 {
 	if (errors == ILibWaitHandle_ErrorStatus_INVALID_HANDLE) { return(FALSE); }
+	if (!ILibMemory_CanaryOK(user)) { return(FALSE); }
+
 	ILibDuktape_HECI_ioctl_data *data = (ILibDuktape_HECI_ioctl_data*)user;
 	ILibQueue Q = data->Q;
 
diff --git a/modules/win-virtual-terminal.js b/modules/win-virtual-terminal.js
index 5b7967f..4907815 100644
--- a/modules/win-virtual-terminal.js
+++ b/modules/win-virtual-terminal.js
@@ -14,9 +14,9 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-const PROC_THREAD_ATTRIBUTE_PSEUDOCONSOLE = 0x00020016;
-const EXTENDED_STARTUPINFO_PRESENT = 0x00080000;
-const HEAP_ZERO_MEMORY = 0x00000008;
+var PROC_THREAD_ATTRIBUTE_PSEUDOCONSOLE = 0x00020016;
+var EXTENDED_STARTUPINFO_PRESENT = 0x00080000;
+var HEAP_ZERO_MEMORY = 0x00000008;
 
 var duplex = require('stream').Duplex;