diff --git a/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp b/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp
index 1ae95c18073..eaefce8a0e0 100644
--- a/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp
@@ -1468,10 +1468,18 @@ CMakeBuildConfiguration::CMakeBuildConfiguration(Target *target, Id id)
 
         // Android magic:
         if (DeviceTypeKitAspect::deviceTypeId(k) == Android::Constants::ANDROID_DEVICE_TYPE) {
+            auto addUniqueKeyToCmd = [&cmd] (const QString &prefix, const QString &value) -> bool {
+                const bool isUnique =
+                    !Utils::contains(cmd.splitArguments(), [&prefix] (const QString &arg) {
+                                                               return arg.startsWith(prefix); });
+                if (isUnique)
+                    cmd.addArg(prefix + value);
+                return isUnique;
+            };
             buildSteps()->appendStep(Android::Constants::ANDROID_BUILD_APK_ID);
             const auto bs = buildSteps()->steps().constLast();
-            cmd.addArg("-DANDROID_PLATFORM:STRING="
-                   + bs->data(Android::Constants::AndroidNdkPlatform).toString());
+            addUniqueKeyToCmd("-DANDROID_PLATFORM:STRING=",
+                              bs->data(Android::Constants::AndroidNdkPlatform).toString());
             auto ndkLocation = bs->data(Android::Constants::NdkLocation).value<FilePath>();
             cmd.addArg("-DANDROID_NDK:PATH=" + ndkLocation.path());