diff --git a/AK8975_FS/libsensors/AdxlSensor.cpp b/AK8975_FS/libsensors/AdxlSensor.cpp
index 7b905bf..cf0c31d 100644
--- a/AK8975_FS/libsensors/AdxlSensor.cpp
+++ b/AK8975_FS/libsensors/AdxlSensor.cpp
@@ -18,6 +18,7 @@
 #include <errno.h>
 #include <math.h>
 #include <poll.h>
+#include <string.h>
 #include <unistd.h>
 #include <dirent.h>
 #include <sys/select.h>
diff --git a/AK8975_FS/libsensors/AkmSensor.cpp b/AK8975_FS/libsensors/AkmSensor.cpp
index 6c8da8b..bcbd445 100644
--- a/AK8975_FS/libsensors/AkmSensor.cpp
+++ b/AK8975_FS/libsensors/AkmSensor.cpp
@@ -18,6 +18,7 @@
 #include <errno.h>
 #include <math.h>
 #include <poll.h>
+#include <string.h>
 #include <unistd.h>
 #include <dirent.h>
 #include <sys/select.h>
diff --git a/AK8975_FS/libsensors/InputEventReader.cpp b/AK8975_FS/libsensors/InputEventReader.cpp
index 1014f29..2d0e8bf 100644
--- a/AK8975_FS/libsensors/InputEventReader.cpp
+++ b/AK8975_FS/libsensors/InputEventReader.cpp
@@ -16,8 +16,9 @@
 
 #include <stdint.h>
 #include <errno.h>
-#include <unistd.h>
 #include <poll.h>
+#include <string.h>
+#include <unistd.h>
 
 #include <sys/cdefs.h>
 #include <sys/types.h>
diff --git a/AK8975_FS/libsensors/SensorBase.cpp b/AK8975_FS/libsensors/SensorBase.cpp
index 3f24fae..0a8c69f 100644
--- a/AK8975_FS/libsensors/SensorBase.cpp
+++ b/AK8975_FS/libsensors/SensorBase.cpp
@@ -18,6 +18,7 @@
 #include <errno.h>
 #include <math.h>
 #include <poll.h>
+#include <string.h>
 #include <unistd.h>
 #include <dirent.h>
 #include <sys/select.h>
diff --git a/AK8975_FS/libsensors/sensors.cpp b/AK8975_FS/libsensors/sensors.cpp
index 3c5aed4..2713436 100644
--- a/AK8975_FS/libsensors/sensors.cpp
+++ b/AK8975_FS/libsensors/sensors.cpp
@@ -24,6 +24,7 @@
 #include <poll.h>
 #include <pthread.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include <linux/input.h>