diff --git a/src/dawg.pyx b/src/dawg.pyx
index 6dba921..015343b 100644
--- a/src/dawg.pyx
+++ b/src/dawg.pyx
@@ -350,7 +350,7 @@ cdef class CompletionDAWG(DAWG):
 
         return completer.Next()
 
-    cpdef bytes tobytes(self) except +:
+    cpdef bytes tobytes(self):
         """
         Return raw DAWG content as bytes.
         """