diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
index b85c1b7..ead1d6f 100644
--- a/Source/WebCore/ChangeLog
+++ b/Source/WebCore/ChangeLog
@@ -1,3 +1,18 @@
+2019-10-10  Jer Noble  <jer.noble@apple.com>
+
+        [Catalina] LayoutTest fast/canvas/webgl/texImage2D-mse-flip-{true,false}.html failing
+        https://bugs.webkit.org/show_bug.cgi?id=202771
+        <rdar://problem/49441298>
+
+        Reviewed by Eric Carlson.
+
+        Catalina no longer creates IOSurface-backed CVPixelBuffers by default for certain
+        codecs; make the CVPixelBuffers generated by WebCoreDecompressionSession IOSurface-backed
+        explicitly by passing in the correct attributes when creating the VTDecompressionSession.
+
+        * platform/graphics/cocoa/WebCoreDecompressionSession.mm:
+        (WebCore::WebCoreDecompressionSession::ensureDecompressionSessionForSample):
+
 2019-10-10  Myles C. Maxfield  <mmaxfield@apple.com>
 
         [Cocoa] font-family:system-ui on Chinese systems don't get Chinese quote marks
diff --git a/Source/WebCore/platform/graphics/cocoa/WebCoreDecompressionSession.mm b/Source/WebCore/platform/graphics/cocoa/WebCoreDecompressionSession.mm
index aad9c66..4230e11 100644
--- a/Source/WebCore/platform/graphics/cocoa/WebCoreDecompressionSession.mm
+++ b/Source/WebCore/platform/graphics/cocoa/WebCoreDecompressionSession.mm
@@ -223,9 +223,9 @@
         auto videoDecoderSpecification = @{ (__bridge NSString *)kVTVideoDecoderSpecification_EnableHardwareAcceleratedVideoDecoder: @YES };
 
         NSDictionary *attributes;
-        if (m_mode == OpenGL) {
-            attributes = nil;
-        } else {
+        if (m_mode == OpenGL)
+            attributes = @{ (__bridge NSString*)kCVPixelBufferIOSurfacePropertiesKey: @{ /* empty dictionary */ } };
+        else {
             ASSERT(m_mode == RGB);
             attributes = @{ (__bridge NSString *)kCVPixelBufferPixelFormatTypeKey: @(kCVPixelFormatType_32BGRA) };
         }