diff --git a/src/finn/transformation/fpgadataflow/create_stitched_ip.py b/src/finn/transformation/fpgadataflow/create_stitched_ip.py
index 9b0a387c57fe02c3d299041c727c94221d0289dc..0e898f63db785f80cfce2683df0c9b6268e3ec7e 100644
--- a/src/finn/transformation/fpgadataflow/create_stitched_ip.py
+++ b/src/finn/transformation/fpgadataflow/create_stitched_ip.py
@@ -49,7 +49,7 @@ class CreateStitchedIP(Transformation):
     The packaged block design IP can be found under the ip subdirectory.
     """
 
-    def __init__(self, fpgapart, clk_ns):
+    def __init__(self, fpgapart, clk_ns = 10.0):
         super().__init__()
         self.fpgapart = fpgapart
         self.clk_ns = clk_ns