diff --git a/man2/futex.2 b/man2/futex.2
index 57a661fb6..edfa5da00 100644
--- a/man2/futex.2
+++ b/man2/futex.2
@@ -76,14 +76,15 @@ implement the contended case of a lock in shared memory, as
 described in
 .BR futex (7).
 .PP
-When a
-.BR futex (7)
-operation did not finish uncontended in user space, a call needs to be made
-to the kernel to arbitrate.
+When a futex operation did not finish uncontended in user space, a
+.BR futex ()
+call needs to be made to the kernel to arbitrate.
 Arbitration can either mean putting the calling
 process to sleep or, conversely, waking a waiting process.
 .PP
-Callers of this function are expected to adhere to the semantics as set out in
+Callers of
+.BR futex ()
+are expected to adhere to the semantics described in
 .BR futex (7).
 As these
 semantics involve writing nonportable assembly instructions, this in turn
@@ -92,11 +93,15 @@ general application developers.
 .PP
 The
 .I uaddr
-argument needs to point to an aligned integer which stores the counter.
-The operation to execute is passed via the
-.I op
-argument, along with a value
-.IR val .
+argument points to an integer which stores the counter (futex).
+On all platforms, futexes are four-byte integers that
+must be aligned on a four-byte boundary.
+The operation to perform on the futex is specified in the
+.I futex_op
+argument;
+.IR val
+is a value whose meaning and purpose depends on
+.IR futex_op .
 .PP
 The
 .I futex_op