diff --git a/sys/compat/linuxkpi/common/include/linux/completion.h b/sys/compat/linuxkpi/common/include/linux/completion.h
index 92ccc61f38d..73c1a99dfc4 100644
--- a/sys/compat/linuxkpi/common/include/linux/completion.h
+++ b/sys/compat/linuxkpi/common/include/linux/completion.h
@@ -32,6 +32,7 @@
 #define	_LINUX_COMPLETION_H_
 
 #include <linux/errno.h>
+#include <linux/wait.h>
 
 struct completion {
 	unsigned int done;