diff --git a/sapi/cli/config.m4 b/sapi/cli/config.m4
index c8d7684164c36..f65c73f4ed1b0 100644
--- a/sapi/cli/config.m4
+++ b/sapi/cli/config.m4
@@ -8,17 +8,16 @@ AC_CHECK_FUNCS([setproctitle])
 
 AC_CHECK_HEADERS([sys/pstat.h])
 
-AC_CACHE_CHECK([for PS_STRINGS], [cli_cv_var_PS_STRINGS],
-[AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <machine/vmparam.h>
+AC_CACHE_CHECK([for PS_STRINGS], [php_cv_var_PS_STRINGS],
+[AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <machine/vmparam.h>
 #include <sys/exec.h>
-]],
-[[PS_STRINGS->ps_nargvstr = 1;
-PS_STRINGS->ps_argvstr = "foo";]])],
-[cli_cv_var_PS_STRINGS=yes],
-[cli_cv_var_PS_STRINGS=no])])
-if test "$cli_cv_var_PS_STRINGS" = yes ; then
-  AC_DEFINE([HAVE_PS_STRINGS], [], [Define to 1 if the PS_STRINGS thing exists.])
-fi
+],
+[PS_STRINGS->ps_nargvstr = 1;
+PS_STRINGS->ps_argvstr = "foo";])],
+[php_cv_var_PS_STRINGS=yes],
+[php_cv_var_PS_STRINGS=no])])
+AS_VAR_IF([php_cv_var_PS_STRINGS], [yes],
+  [AC_DEFINE([HAVE_PS_STRINGS], [], [Define if the PS_STRINGS exists.])])
 
 AC_MSG_CHECKING(for CLI build)
 if test "$PHP_CLI" != "no"; then