diff --git a/webbuild/webbuild-sudo b/webbuild/webbuild-sudo
index 300db2a..ab83bc1 100755
--- a/webbuild/webbuild-sudo
+++ b/webbuild/webbuild-sudo
@@ -93,7 +93,7 @@ if [ "$MODE" = "specinfo" ]; then
          echo "SPECVAR_Specfile=\"$SPECFILE\""
          # Resolve builddir by parsing %setup macro or use default
          BUILDDIR_UNPARSED=`grep "^%setup" ${WORKINGHOME}/RPM/SPECS/$PACKAGE.spec | sed "s|.*-n \([^[:space:]]*\).*|\1|"`
-         if [ "$BUILDDIR_UNPARSED/%setup" != "$BUILDDIR_UNPARSED" ]; then
+         if [ "${BUILDDIR_UNPARSED/%setup}" != "${BUILDDIR_UNPARSED}" ]; then
             BUILDDIR_UNPARSED="$PACKAGE-%{version}"
          fi
          BUILDDIR=`rpmspec -q --srpm --queryformat "${BUILDDIR_UNPARSED}" ${WORKINGHOME}/RPM/SPECS/$PACKAGE.spec`