diff --git a/src/vfs/ant_native_chardev.c b/src/vfs/ant_native_chardev.c
index 2b49a8c..759b385 100644
--- a/src/vfs/ant_native_chardev.c
+++ b/src/vfs/ant_native_chardev.c
@@ -27,6 +27,7 @@
 \******************************************************************************/
 
 #include <errno.h>
+#include <string.h>
 #include <fcntl.h> /* for open() */
 #include <linux/ioctl.h> /* For hard reset */
 #include <pthread.h>
diff --git a/src/vfs/ant_rx_chardev.c b/src/vfs/ant_rx_chardev.c
index 94c09b1..2a2ec7f 100644
--- a/src/vfs/ant_rx_chardev.c
+++ b/src/vfs/ant_rx_chardev.c
@@ -27,6 +27,7 @@
 \******************************************************************************/
 
 #include <errno.h>
+#include <string.h>
 #include <poll.h>
 #include <pthread.h>
 #include <stdint.h> /* for uint64_t */