diff --git a/rpcs3/Input/gui_pad_thread.cpp b/rpcs3/Input/gui_pad_thread.cpp
index 92fb23367d..e3dbae5183 100644
--- a/rpcs3/Input/gui_pad_thread.cpp
+++ b/rpcs3/Input/gui_pad_thread.cpp
@@ -22,6 +22,7 @@
 #ifdef __linux__
 #include <linux/uinput.h>
 #include <fcntl.h>
+#include <unistd.h>
 #define CHECK_IOCTRL_RET(res) if (res == -1) { gui_log.error("gui_pad_thread: ioctl failed (errno=%d=%s)", res, strerror(errno)); }
 #elif defined(__APPLE__)
 #pragma GCC diagnostic push