diff --git a/src/gateware/cxp_4r_fmc.py b/src/gateware/cxp_4r_fmc.py
index e763c79..6e2718c 100644
--- a/src/gateware/cxp_4r_fmc.py
+++ b/src/gateware/cxp_4r_fmc.py
@@ -19,7 +19,7 @@ fmc_adapter_io = [
         Subsignal("txp", Pins("HPC:DP2_C2M_P")),
         Subsignal("txn", Pins("HPC:DP2_C2M_N")),
         Subsignal("rxp", Pins("HPC:DP2_M2C_P")),
-        Subsignal("rxn", Pins("HPC:DP2_M2C_n")),
+        Subsignal("rxn", Pins("HPC:DP2_M2C_N")),
     ),
     ("CXP_HS", 3,
         Subsignal("txp", Pins("HPC:DP3_C2M_P")),