diff --git a/ext/jruby/org/jruby/ext/strscan/RubyStringScanner.java b/ext/jruby/org/jruby/ext/strscan/RubyStringScanner.java
index 3baa6773eb..933b82e4b9 100644
--- a/ext/jruby/org/jruby/ext/strscan/RubyStringScanner.java
+++ b/ext/jruby/org/jruby/ext/strscan/RubyStringScanner.java
@@ -857,7 +857,7 @@ public IRubyObject fixed_anchor_p(ThreadContext context) {
     }
 
     @JRubyMethod(name = "named_captures")
-    public IRubyObject named_captured(ThreadContext context) {
+    public IRubyObject named_captures(ThreadContext context) {
         Ruby runtime = context.runtime;
         IRubyObject nil = context.nil;
 
@@ -872,7 +872,10 @@ public IRubyObject named_captured(ThreadContext context) {
             IRubyObject value = nil;
 
             for (int i : nameEntry.getBackRefs()) {
-                value = extractRegion(context, i);
+                IRubyObject v = extractRegion(context, i);
+                if (v != nil) {
+                    value = v;
+                }
             }
 
             int nameP = nameEntry.nameP;
diff --git a/ext/strscan/strscan.c b/ext/strscan/strscan.c
index 2824eeb4d9..9d6bd4c601 100644
--- a/ext/strscan/strscan.c
+++ b/ext/strscan/strscan.c
@@ -2211,7 +2211,10 @@ named_captures_iter(const OnigUChar *name,
     VALUE value = RUBY_Qnil;
     int i;
     for (i = 0; i < back_num; i++) {
-        value = strscan_aref(data->self, INT2NUM(back_refs[i]));
+        VALUE v = strscan_aref(data->self, INT2NUM(back_refs[i]));
+        if (!RB_NIL_P(v)) {
+            value = v;
+        }
     }
     rb_hash_aset(data->captures, key, value);
     return 0;
diff --git a/test/strscan/test_stringscanner.rb b/test/strscan/test_stringscanner.rb
index 0a28d92368..e895a8382b 100644
--- a/test/strscan/test_stringscanner.rb
+++ b/test/strscan/test_stringscanner.rb
@@ -967,6 +967,12 @@ def test_named_captures
     assert_equal({}, scan.named_captures)
   end
 
+  def test_named_captures_same_name_union
+    scan = StringScanner.new("123")
+    assert_equal(1, scan.match?(/(?<number>0)|(?<number>1)|(?<number>2)/))
+    assert_equal({"number" => "1"}, scan.named_captures)
+  end
+
   def test_scan_integer
     s = create_string_scanner('abc')
     assert_equal(3, s.match?(/(?<a>abc)/)) # set named_captures