diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c
index 6e3edd745c681c70bbc8e63e2675a06edb5f1829..ec76ace8bf1ff71f5686de0bbe37e4e3a61025ff 100644
--- a/kernel/trace/trace_stack.c
+++ b/kernel/trace/trace_stack.c
@@ -196,6 +196,11 @@ check_stack(unsigned long ip, unsigned long *stack)
 	local_irq_restore(flags);
 }
 
+/* Some archs may not define MCOUNT_INSN_SIZE */
+#ifndef MCOUNT_INSN_SIZE
+# define MCOUNT_INSN_SIZE 0
+#endif
+
 static void
 stack_trace_call(unsigned long ip, unsigned long parent_ip,
 		 struct ftrace_ops *op, struct pt_regs *pt_regs)