diff --git a/syntax/basic/members.vim b/syntax/basic/members.vim
index 27e10af4..90851c1b 100644
--- a/syntax/basic/members.vim
+++ b/syntax/basic/members.vim
@@ -5,7 +5,7 @@ syntax keyword typescriptConstructor           contained constructor
 
 syntax cluster memberNextGroup contains=typescriptMemberOptionality,typescriptTypeAnnotation,@typescriptCallSignature
 
-syntax match typescriptMember /\K\k*/
+syntax match typescriptMember /#\?\K\k*/
   \ nextgroup=@memberNextGroup
   \ contained skipwhite
 
diff --git a/syntax/common.vim b/syntax/common.vim
index e9a49434..843e6f37 100644
--- a/syntax/common.vim
+++ b/syntax/common.vim
@@ -11,6 +11,8 @@ if main_syntax == 'typescript' || main_syntax == 'typescriptreact'
   setlocal iskeyword+=$
   " syntax cluster htmlJavaScript                 contains=TOP
 endif
+" For private field added from TypeScript 3.8
+setlocal iskeyword+=#
 
 " lowest priority on least used feature
 syntax match   typescriptLabel                /[a-zA-Z_$]\k*:/he=e-1 contains=typescriptReserved nextgroup=@typescriptStatement skipwhite skipempty
diff --git a/test/syntax.vader b/test/syntax.vader
index f2dffccc..458a07bf 100644
--- a/test/syntax.vader
+++ b/test/syntax.vader
@@ -613,3 +613,16 @@ Execute:
   AssertEqual 'typescriptSpecial', SyntaxAt(1, 12)
   AssertEqual 'typescriptTemplate', SyntaxAt(1, 14)
   AssertEqual 'typescriptTemplate', SyntaxAt(1, 17)
+
+Given typescript (private class instance field):
+  class C {
+    #abc = 10;
+    foo() {
+      this.#abc;
+    }
+  }
+Execute:
+  " At '#' in '#abc'
+  AssertEqual 'typescriptMember', SyntaxAt(2, 3)
+  " At 'c' in '#abc'
+  AssertEqual 'typescriptMember', SyntaxAt(2, 6)