diff --git a/configure.ac b/configure.ac
index 77c613e07..bd63a21c3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2419,6 +2419,7 @@ AC_CHECK_HEADERS(
         stdbool.h \
         arpa/tftp.h \
         sys/filio.h \
+        sys/wait.h \
         setjmp.h,
 dnl to do if not found
 [],