2 files changed, 29 insertions, 0 deletions

diff --git a/src/WixToolset.BuildTasks/DoIt.cs b/src/WixToolset.BuildTasks/DoIt.cs
index ac0f895c..7089ff12 100644
--- a/src/WixToolset.BuildTasks/DoIt.cs
+++ b/src/WixToolset.BuildTasks/DoIt.cs
@@ -159,6 +159,7 @@ namespace WixToolset.BuildTasks
 
             commandLineBuilder.AppendTextUnquoted("build");
 
+            commandLineBuilder.AppendSwitchIfNotNull("-platform ", this.InstallerPlatform);
             commandLineBuilder.AppendSwitchIfNotNull("-out ", this.OutputFile);
             commandLineBuilder.AppendSwitchIfNotNull("-outputType ", this.OutputType);
             commandLineBuilder.AppendIfTrue("-nologo", this.NoLogo);
diff --git a/src/test/WixToolsetTest.BuildTasks/MsbuildFixture.cs b/src/test/WixToolsetTest.BuildTasks/MsbuildFixture.cs
index 3b96f0ba..74978322 100644
--- a/src/test/WixToolsetTest.BuildTasks/MsbuildFixture.cs
+++ b/src/test/WixToolsetTest.BuildTasks/MsbuildFixture.cs
@@ -39,6 +39,9 @@ namespace WixToolsetTest.BuildTasks
                 });
                 result.AssertSuccess();
 
+                var platformSwitches = result.Output.Where(line => line.TrimStart().StartsWith("wix.exe build -platform x86"));
+                Assert.Single(platformSwitches);
+
                 var warnings = result.Output.Where(line => line.Contains(": warning"));
                 Assert.Equal(4, warnings.Count());
 
@@ -55,6 +58,31 @@ namespace WixToolsetTest.BuildTasks
             }
         }
 
+        [Fact]
+        public void CanBuild64BitMsiPackage()
+        {
+            var projectPath = TestData.Get(@"TestData\SimpleMsiPackage\MsiPackage\MsiPackage.wixproj");
+
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var binFolder = Path.Combine(baseFolder, @"bin\");
+                var intermediateFolder = Path.Combine(baseFolder, @"obj\");
+
+                var result = this.MsbuildRunner.Execute(projectPath, new[]
+                {
+                    $"-p:WixTargetsPath={WixTargetsPath}",
+                    $"-p:IntermediateOutputPath={intermediateFolder}",
+                    $"-p:OutputPath={binFolder}",
+                    $"-p:InstallerPlatform=x64",
+                });
+                result.AssertSuccess();
+
+                var platformSwitches = result.Output.Where(line => line.TrimStart().StartsWith("wix.exe build -platform x64"));
+                Assert.Single(platformSwitches);
+            }
+        }
+
         [Fact(Skip = "Currently fails")]
         public void CanBuildSimpleMsiPackageWithIceSuppressions()
         {