diff --git a/man3/pthread_getattr_default_np.3 b/man3/pthread_getattr_default_np.3
index 903d5095a..5973af5ec 100644
--- a/man3/pthread_getattr_default_np.3
+++ b/man3/pthread_getattr_default_np.3
@@ -32,7 +32,7 @@ get or set default thread-creation attributes
 .B #include <pthread.h>
 .PP
 .BI "int pthread_getattr_default_np(pthread_attr_t *" attr );
-.BI "int pthread_setattr_default_np(pthread_attr_t *" attr );
+.BI "int pthread_setattr_default_np(const pthread_attr_t *" attr );
 .PP
 Compile and link with \fI\-pthread\fP.
 .fi