diff --git a/time.c b/time.c
index 603fe8bf63..7c0cf8bd92 100644
--- a/time.c
+++ b/time.c
@@ -2603,7 +2603,7 @@ obj2subsecx(VALUE obj, VALUE *subsecx)
     return obj2ubits(obj, 6); /* vtm->sec */
 }
 
-static long
+static VALUE
 usec2subsecx(VALUE obj)
 {
     if (RB_TYPE_P(obj, T_STRING)) {
diff --git a/version.h b/version.h
index 65472f1b4a..bd793edead 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.3.3"
 #define RUBY_RELEASE_DATE "2017-02-08"
-#define RUBY_PATCHLEVEL 239
+#define RUBY_PATCHLEVEL 240
 
 #define RUBY_RELEASE_YEAR 2017
 #define RUBY_RELEASE_MONTH 2