diff --git a/build/win32/vs10/gtk+.sln b/build/win32/vs10/gtk+.sln
index 26b58534fb..2dfe27023f 100644
--- a/build/win32/vs10/gtk+.sln
+++ b/build/win32/vs10/gtk+.sln
@@ -12,7 +12,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "gailutil", "gailutil.vcxpro
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libwimp", "libwimp.vcxproj", "{7660FB4E-2AE6-483E-8813-0974CBE6F97F}"
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "gtk-install", "gtk-install.vcxproj", "{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "gtk-install", "gtk-install.vcxproj", "{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -70,14 +70,14 @@ Global
 		{7660FB4E-2AE6-483E-8813-0974CBE6F97F}.Release|Win32.Build.0 = Release|Win32
 		{7660FB4E-2AE6-483E-8813-0974CBE6F97F}.Release|x64.ActiveCfg = Release|x64
 		{7660FB4E-2AE6-483E-8813-0974CBE6F97F}.Release|x64.Build.0 = Release|x64
-		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}.Debug|Win32.ActiveCfg = Debug|Win32
-		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}.Debug|Win32.Build.0 = Debug|Win32
-		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}.Debug|x64.ActiveCfg = Debug|x64
-		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}.Debug|x64.Build.0 = Debug|x64
-		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}.Release|Win32.ActiveCfg = Release|Win32
-		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}.Release|Win32.Build.0 = Release|Win32
-		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}.Release|x64.ActiveCfg = Release|x64
-		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}.Release|x64.Build.0 = Release|x64
+		{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}.Debug|Win32.ActiveCfg = Debug|Win32
+		{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}.Debug|Win32.Build.0 = Debug|Win32
+		{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}.Debug|x64.ActiveCfg = Debug|x64
+		{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}.Debug|x64.Build.0 = Debug|x64
+		{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}.Release|Win32.ActiveCfg = Release|Win32
+		{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}.Release|Win32.Build.0 = Release|Win32
+		{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}.Release|x64.ActiveCfg = Release|x64
+		{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}.Release|x64.Build.0 = Release|x64
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/build/win32/vs10/gtk-install.vcxproj b/build/win32/vs10/gtk-install.vcxproj
index d66e2d62c8..86437c205b 100644
--- a/build/win32/vs10/gtk-install.vcxproj
+++ b/build/win32/vs10/gtk-install.vcxproj
@@ -19,7 +19,7 @@
     </ProjectConfiguration>
   </ItemGroup>
   <PropertyGroup Label="Globals">
-    <ProjectGuid>{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}</ProjectGuid>
+    <ProjectGuid>{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}</ProjectGuid>
     <RootNamespace>gtkinstall</RootNamespace>
     <Keyword>Win32Proj</Keyword>
   </PropertyGroup>
diff --git a/build/win32/vs9/gtk+.sln b/build/win32/vs9/gtk+.sln
index 2537881406..853b23d419 100644
--- a/build/win32/vs9/gtk+.sln
+++ b/build/win32/vs9/gtk+.sln
@@ -18,7 +18,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "gtk-demo", "gtk-demo.vcproj
 		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073F7} = {FC5AADB5-95CD-4BF0-BA8B-0C16FE7073F7}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "gtk-install", "gtk-install.vcproj", "{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "gtk-install", "gtk-install.vcproj", "{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}"
 	ProjectSection(ProjectDependencies) = postProject
 		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073F5} = {FC5AADB5-95CD-4BF0-BA8B-0C16FE7073F5}
 		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073F7} = {FC5AADB5-95CD-4BF0-BA8B-0C16FE7073F7}
@@ -79,14 +79,14 @@ Global
 		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FC}.Release|Win32.Build.0 = Release|Win32
 		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FC}.Release|x64.ActiveCfg = Release|x64
 		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FC}.Release|x64.Build.0 = Release|x64
-		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}.Debug|Win32.ActiveCfg = Debug|Win32
-		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}.Debug|Win32.Build.0 = Debug|Win32
-		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}.Debug|x64.ActiveCfg = Debug|x64
-		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}.Debug|x64.Build.0 = Debug|x64
-		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}.Release|Win32.ActiveCfg = Release|Win32
-		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}.Release|Win32.Build.0 = Release|Win32
-		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}.Release|x64.ActiveCfg = Release|x64
-		{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}.Release|x64.Build.0 = Release|x64
+		{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}.Debug|Win32.ActiveCfg = Debug|Win32
+		{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}.Debug|Win32.Build.0 = Debug|Win32
+		{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}.Debug|x64.ActiveCfg = Debug|x64
+		{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}.Debug|x64.Build.0 = Debug|x64
+		{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}.Release|Win32.ActiveCfg = Release|Win32
+		{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}.Release|Win32.Build.0 = Release|Win32
+		{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}.Release|x64.ActiveCfg = Release|x64
+		{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}.Release|x64.Build.0 = Release|x64
 		{B3B6558A-01C8-4C72-9BDE-84ABB1AE67DF}.Debug|Win32.ActiveCfg = Debug|Win32
 		{B3B6558A-01C8-4C72-9BDE-84ABB1AE67DF}.Debug|Win32.Build.0 = Debug|Win32
 		{B3B6558A-01C8-4C72-9BDE-84ABB1AE67DF}.Debug|x64.ActiveCfg = Debug|x64
diff --git a/build/win32/vs9/gtk-install.vcproj b/build/win32/vs9/gtk-install.vcproj
index ec88e75fe0..2396b9a61a 100644
--- a/build/win32/vs9/gtk-install.vcproj
+++ b/build/win32/vs9/gtk-install.vcproj
@@ -3,7 +3,7 @@
 	ProjectType="Visual C++"
 	Version="9.00"
 	Name="gtk-install"
-	ProjectGUID="{FC5AADB5-95CD-4BF0-BA8B-0C16FE7073FB}"
+	ProjectGUID="{FC5AADB5-95CD-4BF0-BA8B-0C16FE8073FB}"
 	RootNamespace="gtkinstall"
 	Keyword="Win32Proj"
 	TargetFrameworkVersion="131072"