diff --git a/c/src/aclocal/check-smp.m4 b/c/src/aclocal/check-smp.m4
index 37c98d05ff..b9b10b1bf2 100644
--- a/c/src/aclocal/check-smp.m4
+++ b/c/src/aclocal/check-smp.m4
@@ -3,7 +3,7 @@ AC_DEFUN([RTEMS_CHECK_SMP],
 AC_REQUIRE([RTEMS_ENABLE_SMP])dnl
 
 AC_CACHE_CHECK([whether CPU supports SMP],
-  rtems_cv_HAS_POSIX_API,
+  rtems_cv_HAS_SMP,
   [dnl
     case "$RTEMS_CPU" in
     *)