diff --git a/libgtop.doap b/libgtop.doap
index c6489cee..56a7d919 100644
--- a/libgtop.doap
+++ b/libgtop.doap
@@ -9,6 +9,7 @@
   <download-page rdf:resource="http://download.gnome.org/sources/libgtop/" />
   <bug-database rdf:resource="http://bugzilla.gnome.org/browse.cgi?product=libgtop" />
   <category rdf:resource="http://api.gnome.org/doap-extensions#core" />
+  <programming-language>C</programming-language>
 
   <maintainer>
     <foaf:Person>