diff --git a/ChangeLog b/ChangeLog
index 2e13d668a7..ad8e78ef7b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-05-03  DJ Delorie  <dj@redhat.com>
+
+	[BZ #21411]
+	* malloc/malloc.c: Tweak realloc/MREMAP comment to be more accurate.
+
 2017-05-03  Phil Blundell  <pb@pbcl.net>
 
 	* inet/netinet/in.h (struct ip_mreq_source): Correct misplaced
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 068ffc1684..aa45626093 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -514,9 +514,9 @@ void*  __libc_calloc(size_t, size_t);
   REALLOC_ZERO_BYTES_FREES is set, realloc with a size argument of
   zero (re)allocates a minimum-sized chunk.
 
-  Large chunks that were internally obtained via mmap will always
-  be reallocated using malloc-copy-free sequences unless
-  the system supports MREMAP (currently only linux).
+  Large chunks that were internally obtained via mmap will always be
+  grown using malloc-copy-free sequences unless the system supports
+  MREMAP (currently only linux).
 
   The old unix realloc convention of allowing the last-free'd chunk
   to be used as an argument to realloc is not supported.