diff --git a/changelog.d/296.bugfix b/changelog.d/296.bugfix
new file mode 100644
index 00000000..b3d28e21
--- /dev/null
+++ b/changelog.d/296.bugfix
@@ -0,0 +1 @@
+Fix a bug in the error handling of 3PID session validation, if the token submitted is incorrect.
diff --git a/sydent/validators/common.py b/sydent/validators/common.py
index 79169d3d..aad23474 100644
--- a/sydent/validators/common.py
+++ b/sydent/validators/common.py
@@ -64,4 +64,4 @@ def validateSessionWithToken(sydent, sid, clientSecret, token):
         return {'success': True}
     else:
         logger.info("Incorrect token submitted")
-        return IncorrectSessionTokenException()
+        raise IncorrectSessionTokenException()