diff --git a/libc/kernel/uapi/linux/lp.h b/libc/kernel/uapi/linux/lp.h
index b3504f0..35d5d5a 100644
--- a/libc/kernel/uapi/linux/lp.h
+++ b/libc/kernel/uapi/linux/lp.h
@@ -18,6 +18,8 @@
  ****************************************************************************/
 #ifndef _UAPI_LINUX_LP_H
 #define _UAPI_LINUX_LP_H
+#include <linux/types.h>
+#include <linux/ioctl.h>
 #define LP_EXIST 0x0001
 #define LP_SELEC 0x0002
 #define LP_BUSY 0x0004
@@ -53,7 +55,13 @@
 #define LPGETSTATS 0x060d
 #endif
 #define LPGETFLAGS 0x060e
-#define LPSETTIMEOUT 0x060f
+#define LPSETTIMEOUT_OLD 0x060f
+#define LPSETTIMEOUT_NEW _IOW(0x6, 0xf, __s64[2])
+#if __BITS_PER_LONG == 64
+#define LPSETTIMEOUT LPSETTIMEOUT_OLD
+#else
+#define LPSETTIMEOUT (sizeof(time_t) > sizeof(__kernel_long_t) ? LPSETTIMEOUT_NEW : LPSETTIMEOUT_OLD)
+#endif
 #define LP_TIMEOUT_INTERRUPT (60 * HZ)
 #define LP_TIMEOUT_POLLED (10 * HZ)
 #endif