diff --git a/opal/mca/event/libevent2021/libevent/configure.ac b/opal/mca/event/libevent2021/libevent/configure.ac
index b78c3ffd6f3..a47dc8c9514 100644
--- a/opal/mca/event/libevent2021/libevent/configure.ac
+++ b/opal/mca/event/libevent2021/libevent/configure.ac
@@ -610,8 +610,6 @@ if test "$enable_epoll" != "no" ; then
 AC_INCLUDES_DEFAULT
 #include <sys/epoll.h>
 ],[[
-int main(int argc, char **argv)
-{
     struct epoll_event epevin;
     struct epoll_event epevout;
     int res;
@@ -639,7 +637,6 @@ int main(int argc, char **argv)
         }
     }
     /* SUCCESS */
-}
 ]])],
         [haveepoll=yes
         # OMPI: Don't use AC_LIBOBJ
@@ -671,9 +668,6 @@ AC_INCLUDES_DEFAULT
 #include <sys/syscall.h>
 #include <sys/epoll.h>
 ],[[
-int
-main(int argc, char **argv)
-{
     struct epoll_event epevin;
     struct epoll_event epevout;
     int res;
@@ -702,7 +696,6 @@ main(int argc, char **argv)
         }
     }
     /* SUCCESS */
-}
 ]])],
         [haveepollsyscall=yes
         # OMPI: don't use AC_LIBOBJ