Index: nping/configure.ac
--- nping/configure.ac.orig
+++ nping/configure.ac
@@ -444,16 +444,13 @@ AC_CACHE_CHECK(if function signal is accessible, ac_cv
         AC_TRY_COMPILE(
                 [
                     #include <signal.h>
-                ],
-                [
                     void handler(int signo){
                      int a=0;
                     }
-
-                    int main () {
-                        ssignal(SIGINT, handler);
-                        return 0;
-                    }
+                ],
+                [
+                    signal(SIGINT, handler);
+                    return 0;
                 ],
         ac_cv_have_signal=yes,
         ac_cv_have_signal=no))