diff --git a/renderdoc/api/replay/gl_pipestate.h b/renderdoc/api/replay/gl_pipestate.h
index 7b2c40b1f..1a7a2e7cd 100644
--- a/renderdoc/api/replay/gl_pipestate.h
+++ b/renderdoc/api/replay/gl_pipestate.h
@@ -190,10 +190,11 @@ struct GLPipelineState
 	{
 		struct Viewport
 		{
-			Viewport() : Left(0.0f), Bottom(0.0f), Width(0.0f), Height(0.0f), MinDepth(0.0f), MaxDepth(0.0f) {}
+			Viewport() : Left(0.0f), Bottom(0.0f), Width(0.0f), Height(0.0f), MinDepth(0.0f), MaxDepth(0.0f), Enabled(true) {}
 			float Left, Bottom;
 			float Width, Height;
 			double MinDepth, MaxDepth;
+			bool32 Enabled;
 		};
 		rdctype::array<Viewport> Viewports;