diff --git a/README.md b/README.md
index 8514db5..afa4daf 100755
--- a/README.md
+++ b/README.md
@@ -114,7 +114,7 @@ specifies the bson data type to be encoded, from the following list:
 * long
 * double
 * bool
-* clock
+* date
 * null
 * undefined
 * binary_generic
diff --git a/generic/bson.c b/generic/bson.c
index bb76ccc..9804921 100644
--- a/generic/bson.c
+++ b/generic/bson.c
@@ -818,7 +818,7 @@ mongotcl_bsonObjectObjCmd(ClientData cData, Tcl_Interp *interp, int objc, Tcl_Ob
         "int",
         "double",
         "bool",
-        "clock",
+        "date",
 		"null",
 		"undefined",
 		"kvlist",
@@ -844,7 +844,7 @@ mongotcl_bsonObjectObjCmd(ClientData cData, Tcl_Interp *interp, int objc, Tcl_Ob
         OPT_APPEND_INT,
         OPT_APPEND_DOUBLE,
         OPT_APPEND_BOOL,
-        OPT_APPEND_CLOCK,
+        OPT_APPEND_DATE,
         OPT_APPEND_NULL,
         OPT_APPEND_UNDEFINED,
 		OPT_APPEND_KVLIST,
@@ -966,7 +966,7 @@ mongotcl_bsonObjectObjCmd(ClientData cData, Tcl_Interp *interp, int objc, Tcl_Ob
 				break;
 			}
 
-			case OPT_APPEND_CLOCK: {
+			case OPT_APPEND_DATE: {
 				long clock;
 				char *key;