diff --git a/ext/ripper/lib/ripper/lexer.rb b/ext/ripper/lib/ripper/lexer.rb
index 344328482b..95e1ebcdfe 100644
--- a/ext/ripper/lib/ripper/lexer.rb
+++ b/ext/ripper/lib/ripper/lexer.rb
@@ -83,6 +83,12 @@ class Ripper
 
     private
 
+    unless SCANNER_EVENT_TABLE.key?(:ignored_sp)
+      SCANNER_EVENT_TABLE[:ignored_sp] = 1
+      SCANNER_EVENTS << :ignored_sp
+      EVENTS << :ignored_sp
+    end
+
     def on_heredoc_dedent(v, w)
       ignored_sp = []
       heredoc = @buf.last
diff --git a/test/ripper/test_scanner_events.rb b/test/ripper/test_scanner_events.rb
index c9fce34a77..1a3413a0f0 100644
--- a/test/ripper/test_scanner_events.rb
+++ b/test/ripper/test_scanner_events.rb
@@ -886,6 +886,13 @@ class TestRipper::ScannerEvents < Test::Unit::TestCase
                  scan('ignored_nl', "1;\r\n")
   end
 
+  def test_ignored_sp
+    assert_equal [],
+                 scan('ignored_sp', "<<~EOS\nheredoc\nEOS")
+    assert_equal ["  "],
+                 scan('ignored_sp', "<<~EOS\n  heredoc\nEOS")
+  end
+
   def test___end__
     assert_equal [],
                  scan('__end__', "")
diff --git a/version.h b/version.h
index 27fb251118..0b3e1cc45b 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.6.1"
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 41
+#define RUBY_PATCHLEVEL 42
 
 #define RUBY_RELEASE_YEAR 2019
 #define RUBY_RELEASE_MONTH 3