diff --git a/man2/getrlimit.2 b/man2/getrlimit.2
index c6b6e4b08..ec9dfcb92 100644
--- a/man2/getrlimit.2
+++ b/man2/getrlimit.2
@@ -126,7 +126,8 @@ argument must be one of:
 .TP
 .B RLIMIT_AS
 This is the maximum size of the process's virtual memory
-(address space) in bytes.
+(address space).
+The limit is specified in bytes, and is rounded down to the system page size.
 .\" since 2.0.27 / 2.1.12
 This limit affects calls to
 .BR brk (2),
@@ -176,9 +177,10 @@ perform an orderly termination upon first receipt of
 .BR SIGXCPU .)
 .TP
 .B RLIMIT_DATA
-This is the maximum size (in bytes)
+This is the maximum size
 of the process's data segment (initialized data,
 uninitialized data, and heap).
+The limit is specified in bytes, and is rounded down to the system page size.
 This limit affects calls to
 .BR brk (2)
 and