diff --git a/include/linux/capability.h b/include/linux/capability.h
index 9b4378af414c..eeb43c4816e5 100644
--- a/include/linux/capability.h
+++ b/include/linux/capability.h
@@ -40,8 +40,6 @@ struct inode;
 struct dentry;
 struct user_namespace;
 
-struct user_namespace *current_user_ns(void);
-
 extern const kernel_cap_t __cap_empty_set;
 extern const kernel_cap_t __cap_init_eff_set;
 
diff --git a/include/linux/cred.h b/include/linux/cred.h
index 94da8d2ea52e..81ac58cb60c8 100644
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
@@ -353,7 +353,10 @@ extern struct user_namespace init_user_ns;
 #ifdef CONFIG_USER_NS
 #define current_user_ns()	(current_cred_xxx(user_ns))
 #else
-#define current_user_ns()	(&init_user_ns)
+static inline struct user_namespace *current_user_ns(void)
+{
+	return &init_user_ns;
+}
 #endif