diff --git a/Modules/CMakeDetermineCompilerId.cmake b/Modules/CMakeDetermineCompilerId.cmake
index 067892ddb..9a256d53f 100644
--- a/Modules/CMakeDetermineCompilerId.cmake
+++ b/Modules/CMakeDetermineCompilerId.cmake
@@ -215,6 +215,17 @@ Id flags: ${testflags}
     else()
       set(id_toolset "")
     endif()
+    if(CMAKE_OSX_DEPLOYMENT_TARGET)
+      set(id_deployment_target
+        "MACOSX_DEPLOYMENT_TARGET = \"${CMAKE_OSX_DEPLOYMENT_TARGET}\";")
+    else()
+      set(id_deployment_target "")
+    endif()
+    if(CMAKE_OSX_SYSROOT)
+      set(id_sdkroot "SDKROOT = \"${CMAKE_OSX_SYSROOT}\";")
+    else()
+      set(id_sdkroot "")
+    endif()
     if(NOT ${XCODE_VERSION} VERSION_LESS 3)
       set(v 3)
       set(ext xcodeproj)
diff --git a/Modules/CompilerId/Xcode-3.pbxproj.in b/Modules/CompilerId/Xcode-3.pbxproj.in
index 6f861ebf4..eabfc6b1c 100644
--- a/Modules/CompilerId/Xcode-3.pbxproj.in
+++ b/Modules/CompilerId/Xcode-3.pbxproj.in
@@ -84,6 +84,8 @@
 				CONFIGURATION_BUILD_DIR = "$(BUILD_DIR)";
 				SYMROOT = .;
 				@id_toolset@
+				@id_deployment_target@
+				@id_sdkroot@
 			};
 			name = Debug;
 		};