diff --git a/libs/hidapi/linux/hid.c b/libs/hidapi/linux/hid.c
index 56dac0fab7..bc6429e4e1 100644
--- a/libs/hidapi/linux/hid.c
+++ b/libs/hidapi/linux/hid.c
@@ -21,6 +21,8 @@
         http://github.com/signal11/hidapi .
 ********************************************************/
 
+#define _POSIX_C_SOURCE 200809L
+
 /* C */
 #include <stdio.h>
 #include <string.h>