diff --git a/audio-echo/app/src/main/cpp/audio_common.h b/audio-echo/app/src/main/cpp/audio_common.h
index 16cd1d0b5..778f903a7 100644
--- a/audio-echo/app/src/main/cpp/audio_common.h
+++ b/audio-echo/app/src/main/cpp/audio_common.h
@@ -18,6 +18,7 @@
 #ifndef NATIVE_AUDIO_AUDIO_COMMON_H
 #define NATIVE_AUDIO_AUDIO_COMMON_H
 
+#include <SLES/OpenSLES.h>
 #include <SLES/OpenSLES_Android.h>
 
 #include "android_debug.h"
diff --git a/audio-echo/app/src/main/cpp/audio_player.h b/audio-echo/app/src/main/cpp/audio_player.h
index d2f29c8f5..58389e7c7 100644
--- a/audio-echo/app/src/main/cpp/audio_player.h
+++ b/audio-echo/app/src/main/cpp/audio_player.h
@@ -17,7 +17,6 @@
 #ifndef NATIVE_AUDIO_AUDIO_PLAYER_H
 #define NATIVE_AUDIO_AUDIO_PLAYER_H
 #include <sys/types.h>
-#include <SLES/OpenSLES_Android.h>
 #include "audio_common.h"
 #include "buf_manager.h"
 #include "debug_utils.h"
diff --git a/endless-tunnel/app/src/main/cpp/common.hpp b/endless-tunnel/app/src/main/cpp/common.hpp
index 06227aeea..e8ad65ec3 100644
--- a/endless-tunnel/app/src/main/cpp/common.hpp
+++ b/endless-tunnel/app/src/main/cpp/common.hpp
@@ -25,6 +25,7 @@ extern "C" {
     #include <android/log.h>
     #include <android_native_app_glue.h>
     #include <unistd.h>
+    #include <stdlib.h>
 }
 #include "glm/glm.hpp"
 #include "glm/gtc/type_ptr.hpp"
diff --git a/native-activity/app/src/main/cpp/main.cpp b/native-activity/app/src/main/cpp/main.cpp
index 29eaf9650..0c4650a47 100644
--- a/native-activity/app/src/main/cpp/main.cpp
+++ b/native-activity/app/src/main/cpp/main.cpp
@@ -18,6 +18,7 @@
 //BEGIN_INCLUDE(all)
 #include <initializer_list>
 #include <memory>
+#include <cstdlib>
 #include <jni.h>
 #include <errno.h>
 #include <cassert>
diff --git a/teapots/common/ndk_helper/shader.cpp b/teapots/common/ndk_helper/shader.cpp
index a8dc50bb6..af7a155b5 100644
--- a/teapots/common/ndk_helper/shader.cpp
+++ b/teapots/common/ndk_helper/shader.cpp
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
+#include <cstdlib>
 #include <EGL/egl.h>
 #include <GLES2/gl2.h>