diff --git a/man2/futex.2 b/man2/futex.2
index f048903a8..6446584ac 100644
--- a/man2/futex.2
+++ b/man2/futex.2
@@ -30,7 +30,7 @@ futex \- fast user-space locking
 .sp
 .BI "int futex(int *" uaddr ", int " futex_op ", int " val ,
 .BI "          const struct timespec *" timeout , \
-" \fR  /* or: \fBu32 \fIval2\fP */ 
+" \fR  /* or: \fBuint32_t \fIval2\fP */
 .BI "          int *" uaddr2 ", int " val3 );
 .fi
 
@@ -141,7 +141,7 @@ is determined by the operation.
 For these operations, the kernel casts the
 .I timeout
 value to
-.IR u32 ,
+.IR uint32_t ,
 and in the remainder of this page, this argument is referred to as
 .I val2
 when interpreted in this fashion.