diff --git a/configure.ac b/configure.ac
index 04aad792e..7b8c036d0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -229,13 +229,14 @@ fi
 AM_CONDITIONAL(ENABLE_UPNP, test "$enable_upnp" = "yes")
 
 AC_ARG_ENABLE(arm-acc,
-	AS_HELP_STRING(--disable-arm-acc,disable arm hardware acceleration),
-	,[enable_arm_acc=yes])
+	AS_HELP_STRING([--enable-arm-acc], [enable arm hardware acceleration @<:@default=yes@:>@]]),
+	[enable_arm_acc="$enableval"],
+	[enable_arm_acc="yes"])
 
-AM_CONDITIONAL(ENABLE_ARM_ACC,test "$enable_arm_acc" = "yes")
 if test "$enable_arm_acc" = "yes"; then
-	AC_DEFINE(ENABLE_ARM_ACC,1,[enable arm hardware acceleration])
+	AC_DEFINE(ENABLE_ARM_ACC, 1, [enable arm hardware acceleration])
 fi
+AM_CONDITIONAL(ENABLE_ARM_ACC, test "$enable_arm_acc" = "yes")
 
 AC_ARG_ENABLE(extupdate,
 	AS_HELP_STRING([--enable-extupdate], [enable extended update routine @<:@default=no@:>@]),