diff --git a/src/auto/configure b/src/auto/configure
index b42f601..27aea9c 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -12004,7 +12004,7 @@
 	getpwent getpwnam getpwuid getrlimit gettimeofday getwd lstat memcmp \
 	memset mkdtemp nanosleep opendir putenv qsort readlink select setenv \
 	setpgid setsid sigaltstack sigstack sigset sigsetjmp sigaction \
-	sigvec strcasecmp strerror strftime stricmp strncasecmp \
+	sigprocmask sigvec strcasecmp strerror strftime stricmp strncasecmp \
 	strnicmp strpbrk strtol tgetent towlower towupper iswupper \
 	usleep utime utimes
 do :