diff --git a/pyfastani/_fastani.pyx b/pyfastani/_fastani.pyx
index 1285d17b9ef2d45a20378d7a6967b21bfeaf60f3..45b2022c427936026e67b12a74caa64565bab2f6 100644
--- a/pyfastani/_fastani.pyx
+++ b/pyfastani/_fastani.pyx
@@ -1107,6 +1107,9 @@ cdef class Mapper(_Parameterized):
             the blocks allowing to query the mapper in parallel for
             several individual genomes.
 
+        .. versionadded:: 0.4.0
+           The `threads` argument.
+
         """
         # delegate to C code
         return self._query_draft(contigs, threads=threads)
@@ -1136,6 +1139,9 @@ cdef class Mapper(_Parameterized):
             the blocks allowing to query the mapper in parallel for
             several individual genomes.
 
+        .. versionadded:: 0.4.0
+           The `threads` argument.
+
         """
         # delegate to C code
         return self._query_draft((sequence,), threads=threads)