diff --git a/man2/mmap.2 b/man2/mmap.2
index 164ba196e..03f2eeb2c 100644
--- a/man2/mmap.2
+++ b/man2/mmap.2
@@ -400,6 +400,11 @@ private writable mappings.
 Populate (prefault) page tables for a mapping.
 For a file mapping, this causes read-ahead on the file.
 This will help to reduce blocking on page faults later.
+The
+.BR mmap ()
+call doesn't fail if the mapping cannot be populated (for example, due
+to limitations on the number of mapped huge pages when using
+.BR MAP_HUGETLB ).
 .BR MAP_POPULATE
 is supported for private mappings only since Linux 2.6.23.
 .TP