diff --git a/lib/AST/ASTImporter.cpp b/lib/AST/ASTImporter.cpp
index 74449a965f900e4be99888e4ec5e4fbcae90f4ff..95492825eb9d7b5f726d2d71710db0c33ee8a332 100644
--- a/lib/AST/ASTImporter.cpp
+++ b/lib/AST/ASTImporter.cpp
@@ -1221,10 +1221,6 @@ static Optional<unsigned> findUntaggedStructOrUnionIndex(RecordDecl *Anon) {
     // If the field looks like this:
     // struct { ... } A;
     QualType FieldType = F->getType();
-    // In case of nested structs.
-    while (const auto *ElabType = dyn_cast<ElaboratedType>(FieldType)) {
-      FieldType = ElabType->getNamedType();
-    }
     if (const auto *RecType = dyn_cast<RecordType>(FieldType)) {
       const RecordDecl *RecDecl = RecType->getDecl();
       if (RecDecl->getDeclContext() == Owner &&
@@ -3024,8 +3020,9 @@ Decl *ASTNodeImporter::VisitRecordDecl(RecordDecl *D) {
       }
       
       if (RecordDecl *FoundRecord = dyn_cast<RecordDecl>(Found)) {
-        if (!SearchName) {
-          // If both unnamed structs/unions are in a record context, make sure
+        if (D->isAnonymousStructOrUnion() && 
+            FoundRecord->isAnonymousStructOrUnion()) {
+          // If both anonymous structs/unions are in a record context, make sure
           // they occur in the same location in the context records.
           if (Optional<unsigned> Index1
               = findUntaggedStructOrUnionIndex(D)) {
diff --git a/test/ASTMerge/struct/Inputs/struct1.c b/test/ASTMerge/struct/Inputs/struct1.c
index a85aec70a84ce718e487424cc0b4156266c34565..0f3e8b9bc3ebfd3252143a09c8474ed569dcf2a2 100644
--- a/test/ASTMerge/struct/Inputs/struct1.c
+++ b/test/ASTMerge/struct/Inputs/struct1.c
@@ -77,65 +77,3 @@ typedef struct {
 } S13;
 
 S13 x13;
-
-// Matches
-struct Unnamed {
-  union {
-    struct {
-      int i;
-    } S;
-    struct {
-      float i;
-    } R;
-  } U;
-} x14;
-
-// Matches
-struct DeepUnnamed {
-  union {
-    union {
-      struct {
-        long i;
-      } S;
-      struct {
-        int i;
-      } R;
-    } U1;
-    union {
-      struct {
-        long i;
-      } S;
-      struct {
-        float i;
-      } T;
-    } U2;
-  } U;
-  struct {
-    long i;
-  } V;
-} x15;
-
-// Mismatch due to unnamed struct used internally
-struct DeepUnnamedError {
-  union {
-    union {
-      struct {
-        long i;
-      } S;
-      struct {
-        int i;
-      } R;
-    } U1;
-    union {
-      struct {
-        long i; // Mismatch here.
-      } S;
-      struct {
-        float i;
-      } T;
-    } U2;
-  } U;
-  struct {
-    long i;
-  } V;
-} x16;
diff --git a/test/ASTMerge/struct/Inputs/struct2.c b/test/ASTMerge/struct/Inputs/struct2.c
index 49fe36d823d0c332401d9d106eef135d668a4cff..7fe17a576b23ac9b55c3b10d1660400e91e01ba3 100644
--- a/test/ASTMerge/struct/Inputs/struct2.c
+++ b/test/ASTMerge/struct/Inputs/struct2.c
@@ -74,65 +74,3 @@ typedef struct {
 } S13;
 
 S13 x13;
-
-// Matches
-struct Unnamed {
-  union {
-    struct {
-      int i;
-    } S;
-    struct {
-      float i;
-    } R;
-  } U;
-} x14;
-
-// Matches
-struct DeepUnnamed {
-  union {
-    union {
-      struct {
-        long i;
-      } S;
-      struct {
-        int i;
-      } R;
-    } U1;
-    union {
-      struct {
-        long i;
-      } S;
-      struct {
-        float i;
-      } T;
-    } U2;
-  } U;
-  struct {
-    long i;
-  } V;
-} x15;
-
-// Mismatch due to unnamed struct used internally
-struct DeepUnnamedError {
-  union {
-    union {
-      struct {
-        long i;
-      } S;
-      struct {
-        int i;
-      } R;
-    } U1;
-    union {
-      struct {
-        float i; // Mismatch here.
-      } S;
-      struct {
-        float i;
-      } T;
-    } U2;
-  } U;
-  struct {
-    long i;
-  } V;
-} x16;
diff --git a/test/ASTMerge/struct/test.c b/test/ASTMerge/struct/test.c
index b7e24416d2509d4f289bca739547bbd03325df9c..ed7750f6beccadc70a47376106cc3840cc823a39 100644
--- a/test/ASTMerge/struct/test.c
+++ b/test/ASTMerge/struct/test.c
@@ -44,12 +44,4 @@
 // CHECK: struct2.c:72:7: note: field 'i' has type 'int' here
 // CHECK: struct2.c:76:5: error: external variable 'x13' declared with incompatible types in different translation units ('S13' vs. 'S13')
 // CHECK: struct1.c:79:5: note: declared here with type 'S13'
-// CHECK: struct1.c:130:7: warning: type 'struct DeepUnnamedError::(anonymous at [[PATH_TO_INPUTS:.+]]/struct1.c:130:7)' has incompatible definitions in different translation units
-// CHECK: struct1.c:131:14: note: field 'i' has type 'long' here
-// CHECK: struct2.c:128:15: note: field 'i' has type 'float' here
-// CHECK: struct1.c:129:5: warning: type 'union DeepUnnamedError::(anonymous at [[PATH_TO_INPUTS]]/struct1.c:129:5)' has incompatible definitions in different translation units
-// CHECK: struct1.c:132:9: note: field 'S' has type 'struct (anonymous struct at [[PATH_TO_INPUTS]]/struct1.c:130:7)' here
-// CHECK: struct2.c:129:9: note: field 'S' has type 'struct (anonymous struct at [[PATH_TO_INPUTS]]/struct2.c:127:7)' here
-// CHECK: struct2.c:138:3: error: external variable 'x16' declared with incompatible types in different translation units ('struct DeepUnnamedError' vs. 'struct DeepUnnamedError')
-// CHECK: struct1.c:141:3: note: declared here with type 'struct DeepUnnamedError'
-// CHECK: 11 warnings and 9 errors generated
+// CHECK: 9 warnings and 8 errors generated