diff --git a/arch/openrisc/kernel/ptrace.c b/arch/openrisc/kernel/ptrace.c
index 4f59fa4e34e5f2c795c3d1e150520513dd78d7d3..228288887d74facd56c89f1f71e102e940ae540e 100644
--- a/arch/openrisc/kernel/ptrace.c
+++ b/arch/openrisc/kernel/ptrace.c
@@ -16,7 +16,6 @@
  *      2 of the License, or (at your option) any later version.
  */
 
-#include <stddef.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/string.h>