diff --git a/litex_boards/platforms/trenz_tec0117.py b/litex_boards/platforms/trenz_tec0117.py
index 37d3241..d007d2d 100644
--- a/litex_boards/platforms/trenz_tec0117.py
+++ b/litex_boards/platforms/trenz_tec0117.py
@@ -89,3 +89,8 @@ class Platform(GowinPlatform):
 
     def create_programmer(self):
         return OpenFPGALoader("littlebee")
+
+    def do_finalize(self, fragment):
+        GowinPlatform.do_finalize(self, fragment)
+        self.add_period_constraint(self.lookup_request("clk12",  loose=True), 1e9/12e6)
+        self.add_period_constraint(self.lookup_request("clk100", loose=True), 1e9/100e6)