diff --git a/clang/lib/Index/IndexSymbol.cpp b/clang/lib/Index/IndexSymbol.cpp
index d7df097..5192122 100644
--- a/clang/lib/Index/IndexSymbol.cpp
+++ b/clang/lib/Index/IndexSymbol.cpp
@@ -290,6 +290,7 @@
   APPLY_FOR_ROLE(RelationExtendedBy);
   APPLY_FOR_ROLE(RelationAccessorOf);
   APPLY_FOR_ROLE(RelationContainedBy);
+  APPLY_FOR_ROLE(RelationIBTypeOf);
 
 #undef APPLY_FOR_ROLE
 }
@@ -319,6 +320,7 @@
     case SymbolRole::RelationExtendedBy: OS << "RelExt"; break;
     case SymbolRole::RelationAccessorOf: OS << "RelAcc"; break;
     case SymbolRole::RelationContainedBy: OS << "RelCont"; break;
+    case SymbolRole::RelationIBTypeOf: OS << "RelIBType"; break;
     }
   });
 }