diff --git a/identify/extensions.py b/identify/extensions.py
index c8f04fb..c5d680a 100644
--- a/identify/extensions.py
+++ b/identify/extensions.py
@@ -286,6 +286,7 @@
     'wkt': {'text', 'wkt'},
     'woff': {'binary', 'woff'},
     'woff2': {'binary', 'woff2'},
+    'wsdl': {'text', 'xml', 'wsdl'},
     'wsgi': {'text', 'wsgi', 'python'},
     'xhtml': {'text', 'xml', 'html', 'xhtml'},
     'xacro': {'text', 'xml', 'urdf', 'xacro'},