diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
index c4c5045..d66c539 100644
--- a/clang/lib/Parse/ParseDecl.cpp
+++ b/clang/lib/Parse/ParseDecl.cpp
@@ -2514,7 +2514,7 @@
   // Issue diagnostic and remove constexpr specifier if present.
   if (DS.hasConstexprSpecifier() && DSC != DeclSpecContext::DSC_condition) {
     Diag(DS.getConstexprSpecLoc(), diag::err_typename_invalid_constexpr)
-        << (DS.getConstexprSpecifier() == CSK_consteval);
+        << DS.getConstexprSpecifier();
     DS.ClearConstexprSpec();
   }
 }
@@ -3653,15 +3653,16 @@
       isInvalid = DS.setModulePrivateSpec(Loc, PrevSpec, DiagID);
       break;
 
-    // constexpr
+    // constexpr, consteval, constinit specifiers
     case tok::kw_constexpr:
       isInvalid = DS.SetConstexprSpec(CSK_constexpr, Loc, PrevSpec, DiagID);
       break;
-
-    // consteval
     case tok::kw_consteval:
       isInvalid = DS.SetConstexprSpec(CSK_consteval, Loc, PrevSpec, DiagID);
       break;
+    case tok::kw_constinit:
+      isInvalid = DS.SetConstexprSpec(CSK_constinit, Loc, PrevSpec, DiagID);
+      break;
 
     // type-specifier
     case tok::kw_short:
@@ -5080,8 +5081,9 @@
   case tok::annot_decltype:
   case tok::kw_constexpr:
 
-    // C++20 consteval.
+    // C++20 consteval and constinit.
   case tok::kw_consteval:
+  case tok::kw_constinit:
 
     // C11 _Atomic
   case tok::kw__Atomic: