diff --git a/man3/addseverity.3 b/man3/addseverity.3
index 2108594e0..cc8a5fc07 100644
--- a/man3/addseverity.3
+++ b/man3/addseverity.3
@@ -36,7 +36,7 @@ is NULL, the severity class with the numeric value
 is removed.
 It is not possible to overwrite or remove one of the default
 severity classes.
-The severity value must be nonnegative.
+The severity value must be non-negative.
 .SH "RETURN VALUE"
 Upon success, the value
 .B MM_OK
diff --git a/man3/cacosh.3 b/man3/cacosh.3
index 318c62917..1bbeee692 100644
--- a/man3/cacosh.3
+++ b/man3/cacosh.3
@@ -20,7 +20,7 @@ The
 function calculates the complex acosh().
 If y = cacosh(z), then z = ccosh(y).
 The imaginary part of y is chosen in the interval [\-pi,pi].
-The real part of y is chosen nonnegative.
+The real part of y is chosen non-negative.
 .LP
 One has cacosh(z) = (0.5)*clog((1+z)/(1\-z)).
 .SH "CONFORMING TO"
diff --git a/man3/csqrt.3 b/man3/csqrt.3
index 60291318b..ca3a0a91e 100644
--- a/man3/csqrt.3
+++ b/man3/csqrt.3
@@ -16,7 +16,7 @@ csqrt, csqrtf, csqrtl \- complex square root
 Link with \-lm.
 .SH DESCRIPTION
 Calculate the square root of a given complex number,
-with nonnegative real part, and
+with non-negative real part, and
 with a branch cut along the negative real axis.
 (That means that csqrt(\-1+eps*I) will be close to I while
 csqrt(\-1\-eps*I) will be close to \-I, if eps is a small positive
diff --git a/man3/fputws.3 b/man3/fputws.3
index cadf4912f..0e55dee75 100644
--- a/man3/fputws.3
+++ b/man3/fputws.3
@@ -30,7 +30,7 @@ For a non-locking counterpart, see
 .BR unlocked_stdio (3).
 .SH "RETURN VALUE"
 The \fBfputws\fP() function returns a 
-nonnegative integer if the operation was
+non-negative integer if the operation was
 successful, or \-1 to indicate an error.
 .SH "CONFORMING TO"
 C99, POSIX.1-2001.
diff --git a/man3/sysconf.3 b/man3/sysconf.3
index 38fd96c0c..12fe6e8be 100644
--- a/man3/sysconf.3
+++ b/man3/sysconf.3
@@ -122,7 +122,7 @@ First, the POSIX.1 compatible values.
 .\" (if _POSIX_ASYNCHRONOUS_IO)
 .\" The maximum amount by which a process can decrease its
 .\" asynchronous I/O priority level from its own scheduling priority.
-.\" Must be nonnegative.
+.\" Must be non-negative.
 .TP
 .BR ARG_MAX " - " _SC_ARG_MAX
 The maximum length of the arguments to the
diff --git a/man3/tgamma.3 b/man3/tgamma.3
index a7ff222c9..d3fa93621 100644
--- a/man3/tgamma.3
+++ b/man3/tgamma.3
@@ -22,7 +22,7 @@ The Gamma function is defined by
  Gamma(x) = integral from 0 to infinity of t^(x\-1) e^\-t dt
 .sp
 It is defined for every real number except for non-positive integers.
-For nonnegative integral \fIm\fP one has
+For non-negative integral \fIm\fP one has
 .sp
  Gamma(m+1) = m!
 .sp
diff --git a/man3/ulimit.3 b/man3/ulimit.3
index cda3f09fc..9395d0faa 100644
--- a/man3/ulimit.3
+++ b/man3/ulimit.3
@@ -69,7 +69,7 @@ Return the maximum number of files that the calling process can open.
 .SH "RETURN VALUE"
 On success,
 .BR ulimit ()
-returns a nonnegative value.
+returns a non-negative value.
 On error, \-1 is returned, and
 .I errno
 is set appropriately.