diff --git a/src/libnpth.vers b/src/libnpth.vers
--- a/src/libnpth.vers
+++ b/src/libnpth.vers
@@ -38,8 +38,6 @@
     npth_sleep;
     npth_waitpid;
     npth_system;
-    npth_sigmask;
-    npth_sigwait;
     npth_connect;
     npth_accept;
     npth_select;
diff --git a/src/npth.h.in b/src/npth.h.in
--- a/src/npth.h.in
+++ b/src/npth.h.in
@@ -335,7 +335,6 @@
 pid_t npth_waitpid(pid_t pid, int *status, int options);
 int npth_system(const char *cmd);
 #define npth_sigmask pthread_sigmask
-int npth_sigwait(const sigset_t *set, int *sig);
 
 int npth_connect(int s, const struct sockaddr *addr, _npth_socklen_t addrlen);
 int npth_accept(int s, struct sockaddr *addr, _npth_socklen_t *addrlen);
diff --git a/w32/npth.h b/w32/npth.h
--- a/w32/npth.h
+++ b/w32/npth.h
@@ -145,12 +145,6 @@
 pid_t npth_waitpid(pid_t pid, int *status, int options);
 int npth_system(const char *cmd);
 
-#if 0
-/* We do not support this on windows.  */
-int npth_sigmask(int how, const sigset_t *set, sigset_t *oldset);
-int npth_sigwait(const sigset_t *set, int *sig);
-#endif
-
 int npth_connect(int s, const struct sockaddr *addr, socklen_t addrlen);
 int npth_accept(int s, struct sockaddr *addr, socklen_t *addrlen);
 /* Only good for sockets!  */