diff --git a/include/linux/stacktrace.h b/include/linux/stacktrace.h
index 115b570e3bff..1fea0380e97f 100644
--- a/include/linux/stacktrace.h
+++ b/include/linux/stacktrace.h
@@ -5,8 +5,6 @@ struct task_struct;
 struct pt_regs;
 
 #ifdef CONFIG_STACKTRACE
-struct task_struct;
-
 struct stack_trace {
 	unsigned int nr_entries, max_entries;
 	unsigned long *entries;