diff --git a/src/BSON/UTCDateTime.c b/src/BSON/UTCDateTime.c
index 4bdc45b93..a33f78334 100644
--- a/src/BSON/UTCDateTime.c
+++ b/src/BSON/UTCDateTime.c
@@ -218,6 +218,8 @@ static PHP_METHOD(MongoDB_BSON_UTCDateTime, __construct)
 			return;
 
 		case IS_DOUBLE:
+			php_error_docref(NULL, E_DEPRECATED, "Creating a %s instance with a float is deprecated and will be removed in ext-mongodb 2.0", ZSTR_VAL(php_phongo_utcdatetime_ce->name));
+
 			php_phongo_utcdatetime_init_from_double(intern, Z_DVAL_P(milliseconds));
 			return;
 
diff --git a/tests/bson/bson-utcdatetime-007.phpt b/tests/bson/bson-utcdatetime-007.phpt
index ec6e53789..9b4cbcd1c 100644
--- a/tests/bson/bson-utcdatetime-007.phpt
+++ b/tests/bson/bson-utcdatetime-007.phpt
@@ -17,6 +17,11 @@ foreach ($tests as $test) {
 ===DONE===
 <?php exit(0); ?>
 --EXPECTF--
+Deprecated: MongoDB\BSON\UTCDateTime::__construct(): Creating a MongoDB\BSON\UTCDateTime instance with a float is deprecated and will be removed in ext-mongodb 2.0 in %s on line %d
+
+Deprecated: MongoDB\BSON\UTCDateTime::__construct(): Creating a MongoDB\BSON\UTCDateTime instance with a float is deprecated and will be removed in ext-mongodb 2.0 in %s on line %d
+
+Deprecated: MongoDB\BSON\UTCDateTime::__construct(): Creating a MongoDB\BSON\UTCDateTime instance with a float is deprecated and will be removed in ext-mongodb 2.0 in %s on line %d
 object(MongoDB\BSON\UTCDateTime)#%d (%d) {
   ["milliseconds"]=>
   string(13) "1416445411987"