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\""
diff --git a/auto/os/conf b/auto/os/conf
index add6068..27e0123 100644
--- a/auto/os/conf
+++ b/auto/os/conf
@@ -54,3 +54,9 @@
     EVENT_MODULES="$EVENT_MODULES $EPOLL_MODULE"
     CORE_SRCS="$CORE_SRCS $EPOLL_SRCS"
 fi
+
+if [ $TEST_BUILD_SIGIO = YES ]; then
+    CFLAGS="$CFLAGS -D HAVE_SIGIO=1 -D TEST_BUILD_SIGIO=1"
+    EVENT_MODULES="$EVENT_MODULES $SIGIO_MODULE"
+    CORE_SRCS="$CORE_SRCS $SIGIO_SRCS"
+fi
diff --git a/auto/sources b/auto/sources
index c83ffa7..1a21c70 100644
--- a/auto/sources
+++ b/auto/sources
@@ -77,6 +77,9 @@
 EPOLL_MODULE="ngx_epoll_module"
 EPOLL_SRCS=src/event/modules/ngx_epoll_module.c
 
+SIGIO_MODULE="ngx_sigio_module"
+SIGIO_SRCS=src/event/modules/ngx_sigio_module.c
+
 IOCP_MODULE="ngx_iocp_module"
 IOCP_SRCS=src/event/modules/ngx_iocp_module.c