diff --git a/man2/execve.2 b/man2/execve.2
index 2e0fa3641..4d8045463 100644
--- a/man2/execve.2
+++ b/man2/execve.2
@@ -110,6 +110,10 @@ similarly, the effective group ID is copied to the saved set-group-ID.
 This copying takes place after any effective ID changes that occur
 because of the set-user-ID and set-group-ID mode bits.
 
+The process's read UID and real GID, as well its supplementary group IDs,
+are unchanged by a call to
+.BR execve (2).
+
 If the executable is an a.out dynamically linked
 binary executable containing
 shared-library stubs, the Linux dynamic linker