--- nut-2.8.2/configure.ac
+++ nut-2.8.2/configure.ac
@@ -2574,20 +2574,20 @@
 NUT_ARG_ENABLE([spellcheck], [Run spellcheck among default checks], [auto])
 
 AC_MSG_CHECKING(whether to run spellcheck among default make check target)
-case "${nut_enable_spellcheck}" in
-	yes) if test "${nut_have_aspell}" = "no" ; then
+AS_CASE(["${nut_enable_spellcheck}"],
+	[yes], [AS_IF([test "${nut_have_aspell}" = "no"], [
 	        AC_MSG_ERROR([Requested to --enable-spellcheck but did not find a good one])
-	     fi
+	     ])
 	     WITH_SPELLCHECK=yes
-	     ;;
-	no)  WITH_SPELLCHECK=no ;;
-	auto) if test "${nut_have_aspell}" = "yes" ; then
+	],
+	[no], [WITH_SPELLCHECK=no],
+	[auto], [AS_IF([test "${nut_have_aspell}" = "yes"], [
 	        WITH_SPELLCHECK=yes
-	    else
+	    ], [
 	        WITH_SPELLCHECK=no
-	    fi
-	    ;;
-esac
+	    ])
+	]
+)
 AC_MSG_RESULT([${WITH_SPELLCHECK}])
 
 AM_CONDITIONAL(WITH_SPELLCHECK, test "${WITH_SPELLCHECK}" = "yes")