nginx-0.0.1-2004-01-30-20:39:00 import
diff --git a/auto/options b/auto/options
index 5311af5..91b9b1b 100644
--- a/auto/options
+++ b/auto/options
@@ -6,6 +6,7 @@
 
 TEST_BUILD_DEVPOLL=NO
 TEST_BUILD_EPOLL=NO
+TEST_BUILD_SIGIO=NO
 
 SELECT=YES
 POLL=YES
@@ -56,6 +57,7 @@
 
         --test-build-devpoll)            TEST_BUILD_DEVPOLL=YES     ;;
         --test-build-epoll)              TEST_BUILD_EPOLL=YES       ;;
+        --test-build-sigio)              TEST_BUILD_SIGIO=YES       ;;
 
         *)
             echo "$0: error: invalid option \"$option\""