diff --git a/build/vsx/LibLinphoneTester-wp8/LibLinphoneTester-wp8.sln b/build/vsx/LibLinphoneTester-wp8/LibLinphoneTester-wp8.sln
index 4729f06a0..c5c7ed8db 100644
--- a/build/vsx/LibLinphoneTester-wp8/LibLinphoneTester-wp8.sln
+++ b/build/vsx/LibLinphoneTester-wp8/LibLinphoneTester-wp8.sln
@@ -34,6 +34,10 @@ EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "cunit", "..\..\..\..\cunit\build\windows\cunit\cunit.vcxproj", "{902DAF1D-EBF1-4D03-B598-143500A50AB4}"
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libmswasapi", "..\..\..\..\mswasapi\mswasapi\mswasapi\mswasapi.vcxproj", "{D22BD217-D0F8-4274-9B3A-F3F35F46482C}"
+	ProjectSection(ProjectDependencies) = postProject
+		{027BAD0E-9179-48C1-9733-7AA7E2C2EC70} = {027BAD0E-9179-48C1-9733-7AA7E2C2EC70}
+		{FFC7B532-0502-4D88-AC98-9E89071CBC97} = {FFC7B532-0502-4D88-AC98-9E89071CBC97}
+	EndProjectSection
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
diff --git a/build/vsx/LibLinphoneTester-wp8/LibLinphoneTester-wp8.v11.suo b/build/vsx/LibLinphoneTester-wp8/LibLinphoneTester-wp8.v11.suo
index b3766f1d0..8a4e2eff3 100644
Binary files a/build/vsx/LibLinphoneTester-wp8/LibLinphoneTester-wp8.v11.suo and b/build/vsx/LibLinphoneTester-wp8/LibLinphoneTester-wp8.v11.suo differ
diff --git a/build/vsx/LibLinphoneTester/LibLinphoneTester.vcxproj b/build/vsx/LibLinphoneTester/LibLinphoneTester.vcxproj
index cd448cb77..4e515921e 100644
--- a/build/vsx/LibLinphoneTester/LibLinphoneTester.vcxproj
+++ b/build/vsx/LibLinphoneTester/LibLinphoneTester.vcxproj
@@ -113,6 +113,7 @@
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
       <CompileAsWinRT>false</CompileAsWinRT>
       <AdditionalUsingDirectories>$(WindowsSDK_MetadataPath);$(AdditionalUsingDirectories)</AdditionalUsingDirectories>
+      <AdditionalIncludeDirectories>$(ProjectDir)..\..\..\..\belle-sip\include;$(ProjectDir)..\..\..\..\oRTP\include;$(ProjectDir)..\..\..\..\mediastreamer2\include;$(ProjectDir)..\..\..\tester;$(ProjectDir)..\..\..\coreapi;$(ProjectDir)..\..\..\include;$(ProjectDir)..\..\..\..\cunit\build\windows\cunit\$(Platform)\$(Configuration);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
diff --git a/coreapi/linphonecore.h b/coreapi/linphonecore.h
index c440d6b7e..86c4919f3 100644
--- a/coreapi/linphonecore.h
+++ b/coreapi/linphonecore.h
@@ -1290,7 +1290,7 @@ int linphone_core_get_current_call_duration(const LinphoneCore *lc);
 
 
 int linphone_core_get_mtu(const LinphoneCore *lc);
-void linphone_core_set_mtu(LinphoneCore *lc, int mtu);
+LINPHONE_PUBLIC void linphone_core_set_mtu(LinphoneCore *lc, int mtu);
 
 /**
  * @ingroup network_parameters
diff --git a/tester/call_tester.c b/tester/call_tester.c
index 4401406c2..bf8fdd7af 100644
--- a/tester/call_tester.c
+++ b/tester/call_tester.c
@@ -205,6 +205,7 @@ static void call_with_dns_time_out(void) {
 	linphone_core_set_sip_transports(marie->lc,&transport);
 	linphone_core_iterate(marie->lc);
 	sal_set_dns_timeout(marie->lc->sal,0);
+	linphone_core_set_mtu(marie->lc, 1300);
 	linphone_core_invite(marie->lc,"sip:toto@toto.com");
 	linphone_core_iterate(marie->lc);
 	linphone_core_iterate(marie->lc);