diff --git a/ext/intl/common/common_date.cpp b/ext/intl/common/common_date.cpp
index 0a7aa023b43c..fb5ca6edaebe 100644
--- a/ext/intl/common/common_date.cpp
+++ b/ext/intl/common/common_date.cpp
@@ -202,7 +202,6 @@ U_CFUNC double intl_zval_to_millis(zval *z, intl_error *err)
 				}
 			}
 		} else {
-			/* TODO: try with cast(), get() to obtain a number */
 			intl_errors_set(err, U_ILLEGAL_ARGUMENT_ERROR,
 				"invalid object type for date/time "
 				"(only IntlCalendar and DateTimeInterface permitted)");