diff --git a/Amazon.IonDotnet.Tests/Common/ReaderTestCommon.cs b/Amazon.IonDotnet.Tests/Common/ReaderTestCommon.cs
index ae599bce..3e7a4ec9 100644
--- a/Amazon.IonDotnet.Tests/Common/ReaderTestCommon.cs
+++ b/Amazon.IonDotnet.Tests/Common/ReaderTestCommon.cs
@@ -220,10 +220,7 @@ public static void ReadTypeAnnotationSymbols_ZeroSymbol(IIonReader reader)
             Assert.AreEqual(IonType.Int, reader.CurrentType);
             Assert.AreEqual(18, reader.IntValue());
             Assert.AreEqual(1, reader.GetTypeAnnotationSymbols().Count());
-            Assert.IsTrue(reader.GetTypeAnnotationSymbols().Any(a => a.Text == null));
-
-            // Commented out following assertion due to bug: https://github.com/amzn/ion-dotnet/issues/89
-            //Assert.IsTrue(reader.GetTypeAnnotationSymbols().Any(a => a.Text == null && a.ImportLocation == null));
+            Assert.IsTrue(reader.GetTypeAnnotationSymbols().Any(a => a.Text == null && a.ImportLocation == default));
         }
 
         public static void ReadTypeAnnotationSymbols_AssertNoUnknownSymbolException(IIonReader reader)
diff --git a/Amazon.IonDotnet/Internals/Text/RawTextReader.cs b/Amazon.IonDotnet/Internals/Text/RawTextReader.cs
index c63cf025..dbdc75f7 100644
--- a/Amazon.IonDotnet/Internals/Text/RawTextReader.cs
+++ b/Amazon.IonDotnet/Internals/Text/RawTextReader.cs
@@ -535,6 +535,10 @@ private SymbolToken ParseSymbolToken(StringBuilder sb, int token)
                     break;
             }
 
+            if (text == null && sid == 0)
+            {
+                return new SymbolToken(text, sid);
+            }
             return new SymbolToken(text, sid, new ImportLocation(GetSymbolTable().Name, sid));
         }
 
diff --git a/Amazon.IonDotnet/Internals/Text/SystemTextReader.cs b/Amazon.IonDotnet/Internals/Text/SystemTextReader.cs
index 54e1c837..4fcb2a17 100644
--- a/Amazon.IonDotnet/Internals/Text/SystemTextReader.cs
+++ b/Amazon.IonDotnet/Internals/Text/SystemTextReader.cs
@@ -526,24 +526,30 @@ public override string[] GetTypeAnnotations()
             for (int index = 0; index < _annotations.Count; index++)
             {
                 SymbolToken symbolToken = _annotations[index];
-                if (symbolToken.Text is null && symbolToken.ImportLocation != default)
+                if (symbolToken.Text is null)
                 {
-                    ISymbolTable symtab = GetSymbolTable();
-
-                    string text = symtab.FindKnownSymbol(symbolToken.ImportLocation.Sid);
-                    if (text == null)
+                    if (symbolToken.ImportLocation == default)
                     {
-                        throw new UnknownSymbolException(symbolToken.ImportLocation.Sid);
+                        throw new UnknownSymbolException(symbolToken.Sid);
                     }
+                    else
+                    {
+                        ISymbolTable symtab = GetSymbolTable();
+
+                        string text = symtab.FindKnownSymbol(symbolToken.ImportLocation.Sid);
+                        if (text == null)
+                        {
+                            throw new UnknownSymbolException(symbolToken.ImportLocation.Sid);
+                        }
 
-                    annotations[index] = symtab.FindKnownSymbol(symbolToken.ImportLocation.Sid);
+                        annotations[index] = symtab.FindKnownSymbol(symbolToken.ImportLocation.Sid);
+                    }
                 }
                 else
                 {
                     annotations[index] = symbolToken.Text;
                 }
             }
-
             return annotations;
         }