diff --git a/lib/Parse/ParseDecl.cpp b/lib/Parse/ParseDecl.cpp
index 5a657dea9b..2a6a0494e5 100644
--- a/lib/Parse/ParseDecl.cpp
+++ b/lib/Parse/ParseDecl.cpp
@@ -1,4 +1,3 @@
-
 //===--- ParseDecl.cpp - Declaration Parsing ------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
@@ -1545,8 +1544,11 @@ ParseStructDeclaration(DeclSpec &DS, FieldCallback &Fields) {
 
     /// struct-declarator: declarator
     /// struct-declarator: declarator[opt] ':' constant-expression
-    if (Tok.isNot(tok::colon))
+    if (Tok.isNot(tok::colon)) {
+      // Don't parse FOO:BAR as if it were a typo for FOO::BAR.
+      ColonProtectionRAIIObject X(*this);
       ParseDeclarator(DeclaratorInfo.D);
+    }
 
     if (Tok.is(tok::colon)) {
       ConsumeToken();
diff --git a/lib/Parse/ParseDeclCXX.cpp b/lib/Parse/ParseDeclCXX.cpp
index d9c8d7da76..34ea9c7d9b 100644
--- a/lib/Parse/ParseDeclCXX.cpp
+++ b/lib/Parse/ParseDeclCXX.cpp
@@ -1090,11 +1090,13 @@ void Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS,
     return ParseCXXClassMemberDeclaration(AS, TemplateInfo);
   }
 
+  // Don't parse FOO:BAR as if it were a typo for FOO::BAR.
+  ColonProtectionRAIIObject X(*this);
+  
   CXX0XAttributeList AttrList;
   // Optional C++0x attribute-specifier
-  if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) {
+  if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier())
     AttrList = ParseCXX0XAttributes();
-  }
 
   if (Tok.is(tok::kw_using)) {
     // FIXME: Check for template aliases
@@ -1138,6 +1140,9 @@ void Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS,
   ParsingDeclarator DeclaratorInfo(*this, DS, Declarator::MemberContext);
 
   if (Tok.isNot(tok::colon)) {
+    // Don't parse FOO:BAR as if it were a typo for FOO::BAR.
+    ColonProtectionRAIIObject X(*this);
+
     // Parse the first declarator.
     ParseDeclarator(DeclaratorInfo);
     // Error parsing the declarator?
diff --git a/test/Parser/cxx-decl.cpp b/test/Parser/cxx-decl.cpp
index 308700e50d..4453c4c3d0 100644
--- a/test/Parser/cxx-decl.cpp
+++ b/test/Parser/cxx-decl.cpp
@@ -2,6 +2,8 @@
 
 int x(*g); // expected-error {{use of undeclared identifier 'g'}}
 
+struct Type { };
+
 
 // PR4451 - We should recover well from the typo of '::' as ':' in a2.
 namespace y {
@@ -31,3 +33,10 @@ class someclass {
     return 1 ? P->x : P->y;
   }
 };
+
+enum { fooenum = 1 };
+
+struct a {
+  int Type : fooenum;
+};
+