diff --git a/configure.in b/configure.in
index 27cb7ada..70dc29cd 100644
--- a/configure.in
+++ b/configure.in
@@ -185,6 +185,7 @@ fi
 dnl Checks for header files.
 AC_HEADER_STDC
 AC_CHECK_HEADERS([fcntl.h stdarg.h inttypes.h stdint.h stddef.h poll.h unistd.h sys/epoll.h sys/time.h sys/queue.h sys/event.h sys/param.h sys/ioctl.h sys/select.h sys/devpoll.h port.h netinet/in.h netinet/in6.h sys/socket.h sys/uio.h arpa/inet.h sys/eventfd.h sys/mman.h sys/sendfile.h sys/wait.h netdb.h])
+AC_CHECK_HEADERS([sys/stat.h])
 AC_CHECK_HEADERS(sys/sysctl.h, [], [], [
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
@@ -284,6 +285,7 @@ AC_HEADER_TIME
 dnl Checks for library functions.
 AC_CHECK_FUNCS([gettimeofday vasprintf fcntl clock_gettime strtok_r strsep])
 AC_CHECK_FUNCS([getnameinfo strlcpy inet_ntop inet_pton signal sigaction strtoll inet_aton pipe eventfd sendfile mmap splice arc4random arc4random_buf issetugid geteuid getegid getprotobynumber setenv unsetenv putenv sysctl])
+AC_CHECK_FUNCS([umask])
 
 AC_CACHE_CHECK(
     [for getaddrinfo],
diff --git a/test/regress_main.c b/test/regress_main.c
index 32557c1e..bbac2b41 100644
--- a/test/regress_main.c
+++ b/test/regress_main.c
@@ -58,6 +58,9 @@
 #endif
 
 #include <sys/types.h>
+#ifdef _EVENT_HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
 
 #ifndef WIN32
 #include <sys/socket.h>
@@ -123,6 +126,9 @@ regress_make_tmpfile(const void *data, size_t datalen)
 	char tmpfilename[32];
 	int fd;
 	strcpy(tmpfilename, "/tmp/eventtmp.XXXXXX");
+#ifdef _EVENT_HAVE_UMASK
+	umask(0077);
+#endif
 	fd = mkstemp(tmpfilename);
 	if (fd == -1)
 		return (-1);