Index: lib/Index/IndexBody.cpp
===================================================================
--- lib/Index/IndexBody.cpp
+++ lib/Index/IndexBody.cpp
@@ -9,6 +9,7 @@
 
 #include "IndexingContext.h"
 #include "clang/AST/RecursiveASTVisitor.h"
+#include "clang/AST/ASTLambda.h"
 
 using namespace clang;
 using namespace clang::index;
@@ -454,6 +455,17 @@
     }
     return true;
   }
+
+  bool VisitParmVarDecl(ParmVarDecl* D) {
+    // Index the parameters of lambda expression.
+    if (IndexCtx.shouldIndexFunctionLocalSymbols()) {
+      const auto *DC = D->getDeclContext();
+      if (DC && isLambdaCallOperator(DC)) {
+        IndexCtx.handleDecl(D);
+      }
+    }
+    return true;
+  }
 };
 
 } // anonymous namespace
Index: test/Index/cxx11-lambdas.cpp
===================================================================
--- test/Index/cxx11-lambdas.cpp
+++ test/Index/cxx11-lambdas.cpp
@@ -31,3 +31,10 @@
 // CHECK-INDEX: [indexEntityReference]: kind: variable | name: localA | USR: c:cxx11-lambdas.cpp@100@S@X@F@f#@localA | lang: C | cursor: DeclRefExpr=localA:6:9 | loc: 8:14
 // CHECK-INDEX: [indexEntityReference]: kind: variable | name: localB | USR: c:cxx11-lambdas.cpp@100@S@X@F@f#@localB | lang: C | cursor: DeclRefExpr=localB:6:17 | loc: 8:23
 // CHECK-INDEX: [indexEntityReference]: kind: variable | name: x | USR: c:cxx11-lambdas.cpp@157@S@X@F@f#@Sa@F@operator()#I#1@x | lang: C | cursor: DeclRefExpr=x:7:46 | loc: 8:32
+// CHECK-INDEX: [indexDeclaration]: kind: variable | name: x | USR: c:cxx11-lambdas.cpp@157@S@X@F@f#@Sa@F@operator()#I#1@x | lang: C | cursor: ParmDecl=x:7:46 (Definition) | loc: 7:46
+
+void f() {
+  auto lambda = [](Integer y) {};
+}
+// RUN: env CINDEXTEST_INDEXLOCALSYMBOLS=1 c-index-test -index-file -std=c++11 %s | FileCheck -check-prefix=CHECK-INDEX2 %s
+// CHECK-INDEX2: indexDeclaration]: kind: variable | name: y | USR: c:cxx11-lambdas.cpp@2548@F@f#@Sa@F@operator()#I#1@y | lang: C | cursor: ParmDecl=y:37:28 (Definition) | loc: 37:28
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