diff --git a/include/windows.media.speechrecognition.idl b/include/windows.media.speechrecognition.idl
index d921241ac55..2cd6170ec42 100644
--- a/include/windows.media.speechrecognition.idl
+++ b/include/windows.media.speechrecognition.idl
@@ -42,6 +42,7 @@ namespace Windows {
             interface ISpeechContinuousRecognitionSession;
             interface ISpeechRecognitionConstraint;
             interface ISpeechRecognitionHypothesis;
+            interface ISpeechRecognitionHypothesisGeneratedEventArgs;
             interface ISpeechRecognitionResult;
             interface ISpeechRecognitionResult2;
             interface ISpeechRecognitionSemanticInterpretation;
@@ -49,6 +50,7 @@ namespace Windows {
             runtimeclass SpeechContinuousRecognitionResultGeneratedEventArgs;
             runtimeclass SpeechContinuousRecognitionSession;
             runtimeclass SpeechRecognitionHypothesis;
+            runtimeclass SpeechRecognitionHypothesisGeneratedEventArgs;
             runtimeclass SpeechRecognitionResult;
             runtimeclass SpeechRecognitionSemanticInterpretation;
         }
@@ -196,6 +198,16 @@ namespace Windows {
                 [propget] HRESULT Text([out, retval] HSTRING *value);
             }
 
+            [
+                contract(Windows.Foundation.UniversalApiContract, 1.0),
+                exclusiveto(Windows.Media.SpeechRecognition.SpeechRecognitionHypothesisGeneratedEventArgs),
+                uuid(55161a7a-8023-5866-411d-1213bb271476)
+            ]
+            interface ISpeechRecognitionHypothesisGeneratedEventArgs : IInspectable
+            {
+                [propget] HRESULT Hypothesis([out, retval] Windows.Media.SpeechRecognition.SpeechRecognitionHypothesis **value);
+            }
+
             [
                 contract(Windows.Foundation.UniversalApiContract, 1.0),
                 exclusiveto(Windows.Media.SpeechRecognition.SpeechRecognitionResult),
@@ -274,6 +286,16 @@ namespace Windows {
                 [default] interface Windows.Media.SpeechRecognition.ISpeechRecognitionHypothesis;
             }
 
+            [
+                contract(Windows.Foundation.UniversalApiContract, 1.0),
+                marshaling_behavior(agile),
+                threading(both)
+            ]
+            runtimeclass SpeechRecognitionHypothesisGeneratedEventArgs
+            {
+                [default] interface Windows.Media.SpeechRecognition.ISpeechRecognitionHypothesisGeneratedEventArgs;
+            }
+
             [
                 contract(Windows.Foundation.UniversalApiContract, 1.0),
                 marshaling_behavior(agile)