diff --git a/branding/Makefile.in b/branding/Makefile.in
index 6db933e..3f610cd 100644
--- a/branding/Makefile.in
+++ b/branding/Makefile.in
@@ -45,6 +45,7 @@ CONVERT=@CONVERT@
 OPTIPNG=@OPTIPNG@
 DESKTOP_INSTALL=@DESKTOP_INSTALL@
 SCOUR=@SCOUR@
+APPSTREAMCLI=@APPSTREAMCLI@
 
 #---[ Rules ]----------------------------------------------------------------------------
 
@@ -129,6 +130,13 @@ $(DESTDIR)$(datarootdir)/pixmaps/%.png: \
 	@$(MKDIR) `dirname $@`
 	@$(INSTALL_DATA) $< $@
 
+validate:
+
+ifneq ($(SCOUR),no)
+	@$(APPSTREAMCLI) validate appdata.xml
+endif
+
+
 install: \
 	install-@OSNAME@
 
diff --git a/branding/appdata.xml.in b/branding/appdata.xml.in
index 9f95ead..1fc4cbd 100644
--- a/branding/appdata.xml.in
+++ b/branding/appdata.xml.in
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <component type="desktop">
-	<id>@PRODUCT_NAME@</id>
+	<id>br.com.bb.pw3270</id>
 	<name>3270 Terminal</name>
 	<name xml:lang="pt_BR">Terminal 3270</name>
 	<summary>IBM 3270 Terminal emulator</summary>
@@ -15,7 +15,7 @@
 	</p>
 	</description>
 
-	<metadata_license>LGPL-3.0</metadata_license>
+	<metadata_license>CC0-1.0</metadata_license>
 	<project_license>LGPL-3.0</project_license>
 
 	<url type="bugtracker">https://github.com/PerryWerneck/pw3270/issues</url>
diff --git a/configure.ac b/configure.ac
index d191fa9..cfec33e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -142,6 +142,7 @@ AC_PATH_TOOL([MSGFMT], [msgfmt], [no])
 AC_PATH_TOOL([VALGRIND], [valgrind], [no])
 
 AC_PATH_TOOL([SCOUR], [scour], [no])
+AC_PATH_TOOL([APPSTREAMCLI],[appstreamcli], [no])
 
 AC_PATH_TOOL([DESKTOP_INSTALL],[desktop-file-install],[no])
 
--
libgit2 0.21.2