diff --git a/src/Compilers/CSharp/Portable/Compiler/NamespaceScopeBuilder.cs b/src/Compilers/CSharp/Portable/Compiler/NamespaceScopeBuilder.cs
index 28ca968ce61811819e5ea77478b382df47100018..441c6001e29cced4aeb4e22c6c43e393586bd52a 100644
--- a/src/Compilers/CSharp/Portable/Compiler/NamespaceScopeBuilder.cs
+++ b/src/Compilers/CSharp/Portable/Compiler/NamespaceScopeBuilder.cs
@@ -155,14 +155,15 @@ private string GuessExternAlias(NamespaceSymbol @namespace, HashSet<string> vali
                     ImmutableArray<string> aliases = reference.Properties.Aliases;
                     if (!aliases.IsDefaultOrEmpty)
                     {
+                        if (aliases.Contains(MetadataReferenceProperties.GlobalAlias))
+                        {
+                            // If the namespace can be referenced without alias qualification, don't use any.
+                            return null;
+                        }
+
                         foreach (string alias in aliases)
                         {
-                            if (alias == MetadataReferenceProperties.GlobalAlias)
-                            {
-                                // Don't bother explicitly emitting "global".
-                                return null;
-                            }
-                            else if (validAliases.Contains(alias))
+                            if (validAliases.Contains(alias))
                             {
                                 // CONSIDER: Dev12 uses the one that appeared in source, whereas we use
                                 // the first one that COULD have appeared in source.  (DevDiv #913022)
diff --git a/src/Compilers/CSharp/Test/Emit/PDB/PDBUsingTests.cs b/src/Compilers/CSharp/Test/Emit/PDB/PDBUsingTests.cs
index 8c23d20d1cbcae4cea7a697291c1b80a75730115..da12dda716735436ec8911db9d0697494205f79e 100644
--- a/src/Compilers/CSharp/Test/Emit/PDB/PDBUsingTests.cs
+++ b/src/Compilers/CSharp/Test/Emit/PDB/PDBUsingTests.cs
@@ -516,7 +516,7 @@ class C { void M() { } }
                 <extern alias=""A""/>
                 <extern alias=""B""/>
                 <alias name=""X"" target=""N"" kind=""namespace""/>
-                <alias name=""Y"" qualifier=""B"" target=""N"" kind=""namespace""/>
+                <alias name=""Y"" target=""N"" kind=""namespace""/>
                 <alias name=""Z"" target=""N"" kind=""namespace""/>
                 <externinfo alias=""A"" assembly=""A, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null""/>
                 <externinfo alias=""B"" assembly=""B, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null""/>