diff --git a/racket/src/worksp/mzcom/mzcom.sln b/racket/src/worksp/mzcom/mzcom.sln
index 9b1b78900a..e5f61b0c14 100644
--- a/racket/src/worksp/mzcom/mzcom.sln
+++ b/racket/src/worksp/mzcom/mzcom.sln
@@ -8,6 +8,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libmzgc", "..\libmzgc\libmz
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libffi", "..\libffi\libffi.vcxproj", "{7DB29F1E-06FD-4E39-97FF-1C7922F6901A}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "librktio", "..\librktio\librktio.vcxproj", "{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}"
+EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "sgc", "..\sgc\sgc.vcxproj", "{8128F0AE-848A-4985-945A-568796A6DDD7}"
 EndProject
 Global
@@ -96,7 +98,27 @@ Global
 		{7DB29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCRelease|Win32.Build.0 = Release|Win32
 		{7DB29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCRelease|x64.ActiveCfg = Release|x64
 		{7DB29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCRelease|x64.Build.0 = Release|x64
-		{8128F0AE-848A-4985-945A-568796A6DDD7}.3m|Win32.ActiveCfg = Release|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.3m|Win32.ActiveCfg = Release|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.3m|Win32.Build.0 = Release|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.3m|x64.ActiveCfg = Release|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.3m|x64.Build.0 = Release|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.Debug|Win32.ActiveCfg = Debug|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.Debug|Win32.Build.0 = Debug|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.Debug|x64.ActiveCfg = Debug|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.Debug|x64.Build.0 = Debug|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.Release|Win32.ActiveCfg = Release|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.Release|Win32.Build.0 = Release|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.Release|x64.ActiveCfg = Release|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.Release|x64.Build.0 = Release|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCDebug|Win32.ActiveCfg = Debug|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCDebug|Win32.Build.0 = Debug|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCDebug|x64.ActiveCfg = Debug|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCDebug|x64.Build.0 = Debug|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCRelease|Win32.ActiveCfg = Release|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCRelease|Win32.Build.0 = Release|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCRelease|x64.ActiveCfg = Release|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCRelease|x64.Build.0 = Release|x64
+                {8128F0AE-848A-4985-945A-568796A6DDD7}.3m|Win32.ActiveCfg = Release|Win32
 		{8128F0AE-848A-4985-945A-568796A6DDD7}.3m|x64.ActiveCfg = Release|x64
 		{8128F0AE-848A-4985-945A-568796A6DDD7}.Debug|Win32.ActiveCfg = Debug|Win32
 		{8128F0AE-848A-4985-945A-568796A6DDD7}.Debug|Win32.Build.0 = Debug|Win32
diff --git a/racket/src/worksp/mzcom/mzcom9.sln b/racket/src/worksp/mzcom/mzcom9.sln
index 4ca623bf26..f19633cca0 100644
--- a/racket/src/worksp/mzcom/mzcom9.sln
+++ b/racket/src/worksp/mzcom/mzcom9.sln
@@ -18,6 +18,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libmzgc", "..\libmzgc\libmz
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libffi", "..\libffi\libffi.vcproj", "{7DB29F1E-06FD-4E39-97FF-1C7922F6901A}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "librktio", "..\librktio\librktio.vcproj", "{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}"
+EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "sgc", "..\sgc\sgc.vcproj", "{8128F0AE-848A-4985-945A-568796A6DDD7}"
 EndProject
 Global
@@ -106,7 +108,27 @@ Global
 		{7DB29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCRelease|Win32.Build.0 = Release|Win32
 		{7DB29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCRelease|x64.ActiveCfg = Release|x64
 		{7DB29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCRelease|x64.Build.0 = Release|x64
-		{8128F0AE-848A-4985-945A-568796A6DDD7}.3m|Win32.ActiveCfg = Release|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.3m|Win32.ActiveCfg = Release|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.3m|Win32.Build.0 = Release|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.3m|x64.ActiveCfg = Release|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.3m|x64.Build.0 = Release|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.Debug|Win32.ActiveCfg = Debug|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.Debug|Win32.Build.0 = Debug|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.Debug|x64.ActiveCfg = Debug|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.Debug|x64.Build.0 = Debug|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.Release|Win32.ActiveCfg = Release|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.Release|Win32.Build.0 = Release|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.Release|x64.ActiveCfg = Release|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.Release|x64.Build.0 = Release|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCDebug|Win32.ActiveCfg = Debug|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCDebug|Win32.Build.0 = Debug|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCDebug|x64.ActiveCfg = Debug|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCDebug|x64.Build.0 = Debug|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCRelease|Win32.ActiveCfg = Release|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCRelease|Win32.Build.0 = Release|Win32
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCRelease|x64.ActiveCfg = Release|x64
+		{ABC29F1E-06FD-4E39-97FF-1C7922F6901A}.AltGCRelease|x64.Build.0 = Release|x64
+                {8128F0AE-848A-4985-945A-568796A6DDD7}.3m|Win32.ActiveCfg = Release|Win32
 		{8128F0AE-848A-4985-945A-568796A6DDD7}.3m|x64.ActiveCfg = Release|x64
 		{8128F0AE-848A-4985-945A-568796A6DDD7}.Debug|Win32.ActiveCfg = Debug|Win32
 		{8128F0AE-848A-4985-945A-568796A6DDD7}.Debug|Win32.Build.0 = Debug|Win32