diff --git a/ext/date/lib/tm2unixtime.c b/ext/date/lib/tm2unixtime.c
index 37b4f43322e3f..d87131dc6086a 100644
--- a/ext/date/lib/tm2unixtime.c
+++ b/ext/date/lib/tm2unixtime.c
@@ -149,9 +149,6 @@ static void do_adjust_for_weekday(timelib_time* time)
 	current_dow = timelib_day_of_week(time->y, time->m, time->d);
 	if (time->relative.weekday_behavior == 2)
 	{
-		if (time->relative.weekday == 0) {
-			time->relative.weekday = 7;
-		}
 		time->d -= current_dow;
 		time->d += time->relative.weekday;
 		return;
diff --git a/ext/date/tests/bug63392.phpt b/ext/date/tests/bug63392.phpt
new file mode 100644
index 0000000000000..51cb7b9ff6d90
--- /dev/null
+++ b/ext/date/tests/bug63392.phpt
@@ -0,0 +1,17 @@
+--TEST--
+Bug #63392 (DateTime::modify() start of week inconsistency)
+Description:
+------------
+
+
+--INI--
+date.timezone=UTC
+--FILE--
+<?php
+
+$dt = new DateTime("2012-05-13");
+$dt->modify("Sunday this week");
+var_dump($dt->format('r'));
+?>
+--EXPECT--
+string(31) "Sun, 13 May 2012 00:00:00 +0000"