diff --git a/include/linux/eventfd.h b/include/linux/eventfd.h
index 7094718b653b7b4ce1ebdc4d8ca37734b4284438..ffcc7724ca210097f70cca236d8e249d09541e64 100644
--- a/include/linux/eventfd.h
+++ b/include/linux/eventfd.h
@@ -11,6 +11,7 @@
 
 #include <linux/fcntl.h>
 #include <linux/wait.h>
+#include <linux/err.h>
 
 /*
  * CAREFUL: Check include/uapi/asm-generic/fcntl.h when defining