diff --git a/configure.in b/configure.in
index f9d6c29ff..6e21f55d0 100644
--- a/configure.in
+++ b/configure.in
@@ -1532,7 +1532,7 @@ AC_TYPE_MODE_T
 AC_TYPE_UID_T
 AC_CHECK_TYPES([sig_atomic_t], , [AC_DEFINE(sig_atomic_t, int)], [#include <sys/types.h>
 #include <signal.h>])
-AC_CHECK_TYPES([sigaction_t], , [AC_DEFINE(HAVE_SIGACTION_T)], [#include <sys/types.h>
+AC_CHECK_TYPES([sigaction_t], [AC_DEFINE(HAVE_SIGACTION_T)], ,[#include <sys/types.h>
 #include <signal.h>])
 SUDO_TYPE_SIZE_T
 SUDO_TYPE_SSIZE_T