diff --git a/configure.in b/configure.in
index 6c71ad7..08acb78 100644
--- a/configure.in
+++ b/configure.in
@@ -2429,7 +2429,8 @@
  setlocale setregid setreuid setsid setpgid setpgrp setuid setvbuf snprintf \
  sigaction siginterrupt sigrelse strftime strlcpy \
  sysconf tcgetpgrp tcsetpgrp tempnam timegm times tmpfile tmpnam tmpnam_r \
- truncate uname unsetenv utimes waitpid wait3 wait4 wcscoll wcsxfrm _getpty)
+ truncate uname unsetenv utimes waitpid wait3 wait4 \
+ wcscoll wcsftime wcsxfrm _getpty)
 
 # For some functions, having a definition is not sufficient, since
 # we want to take their address.