diff --git a/man2/ioctl_userfaultfd.2 b/man2/ioctl_userfaultfd.2
index cd3e089b7..d417e30f3 100644
--- a/man2/ioctl_userfaultfd.2
+++ b/man2/ioctl_userfaultfd.2
@@ -421,8 +421,8 @@ structure pointed to by
 .in +4n
 .EX
 struct uffdio_copy {
-    __u64 dst;    /* Source of copy */
-    __u64 src;    /* Destination of copy */
+    __u64 dst;    /* Destination of copy */
+    __u64 src;    /* Source of copy */
     __u64 len;    /* Number of bytes to copy */
     __u64 mode;   /* Flags controlling behavior of copy */
     __s64 copy;   /* Number of bytes copied, or negated error */