diff --git a/cmake/org.eclipse.cdt.cmake.core/src/org/eclipse/cdt/cmake/core/internal/CommandDescriptorBuilder.java b/cmake/org.eclipse.cdt.cmake.core/src/org/eclipse/cdt/cmake/core/internal/CommandDescriptorBuilder.java
index a0957a66df4..715ce1b8743 100644
--- a/cmake/org.eclipse.cdt.cmake.core/src/org/eclipse/cdt/cmake/core/internal/CommandDescriptorBuilder.java
+++ b/cmake/org.eclipse.cdt.cmake.core/src/org/eclipse/cdt/cmake/core/internal/CommandDescriptorBuilder.java
@@ -78,8 +78,6 @@ CommandDescriptor makeCMakeCommandline(Path toolChainFile) throws CoreException
 			}
 		}
 		CommandDescriptorBuilder.appendCMakeArguments(args, cmakeProperties.getExtraArguments());
-		/* add settings for the operating system we are running under */
-		CommandDescriptorBuilder.appendCMakeOsOverrideArgs(args, overridesSelector.getOsOverrides(cmakeProperties));
 
 		/* at last, add our requirements that override extra args specified by the user... */
 		{
@@ -94,6 +92,10 @@ CommandDescriptor makeCMakeCommandline(Path toolChainFile) throws CoreException
 		if (toolChainFile != null) {
 			args.add("-DCMAKE_TOOLCHAIN_FILE=" + toolChainFile.toString()); //$NON-NLS-1$
 		}
+		/* Add settings for the operating system we are running under,
+		 * and the user additional CMake arguments set in the Launch Configuration UI.
+		 */
+		CommandDescriptorBuilder.appendCMakeOsOverrideArgs(args, overridesSelector.getOsOverrides(cmakeProperties));
 
 		return new CommandDescriptor(args, env);
 	}