diff --git a/litex_boards/platforms/zcu104.py b/litex_boards/platforms/zcu104.py
index 72a2e14..cabfc22 100644
--- a/litex_boards/platforms/zcu104.py
+++ b/litex_boards/platforms/zcu104.py
@@ -43,7 +43,7 @@ _io = [
         IOStandard("LVCMOS18")
     ),
 
-    ("i2c", 1,
+    ("i2c", 0,
         Subsignal("sda", Pins("P12")),
         Subsignal("scl", Pins("N12")),
         IOStandard("LVCMOS33")
diff --git a/litex_boards/targets/zcu104.py b/litex_boards/targets/zcu104.py
index a4c2193..fcf6014 100755
--- a/litex_boards/targets/zcu104.py
+++ b/litex_boards/targets/zcu104.py
@@ -78,7 +78,7 @@ class BaseSoC(SoCCore):
                 l2_cache_reverse        = True
             )
 
-            self.submodules.i2c = I2CMaster(platform.request("i2c", 1))
+            self.submodules.i2c = I2CMaster(platform.request("i2c"))
             self.add_csr("i2c")
 
         # Leds -------------------------------------------------------------------------------------