diff --git a/aclocal/ax_signed_right_shift.m4 b/aclocal/ax_signed_right_shift.m4
index 0195233..9c3ceb7 100644
--- a/aclocal/ax_signed_right_shift.m4
+++ b/aclocal/ax_signed_right_shift.m4
@@ -104,7 +104,7 @@
           AC_DEFINE([LOGICAL_RIGHT_SHIFT], 2, [Possible value for SIGNED_RIGHT_SHIFT_IS])
           AC_DEFINE([UNKNOWN_RIGHT_SHIFT], 3, [Possible value for SIGNED_RIGHT_SHIFT_IS])
 
-          if test "$success_arithmetic" = "yes" && test "$success_logica" = "yes" ; then
+          if test "$success_arithmetic" = "yes" && test "$success_logical" = "yes" ; then
             AC_MSG_ERROR("Right shift appears to be both arithmetic and logical!")
           elif test "$success_arithmetic" = "yes" ; then
             ax_signed_right_shift=arithmetic