diff --git a/sc2/configure.ac b/sc2/configure.ac
index a4c20d520..1683f7059 100644
--- a/sc2/configure.ac
+++ b/sc2/configure.ac
@@ -184,7 +184,7 @@ AC_ARG_ENABLE(debug,
 	esac],
 	[debug=false])
 AM_CONDITIONAL(DEBUG, test x$debug = xtrue)
-if [ "x$debug" = "xtrue" ]; then
+if test "x$debug" = "xtrue"; then
 	CFLAGS="$CFLAGS -g"
 fi