diff --git a/src/knx_facade.cpp b/src/knx_facade.cpp
index 4180f5e..3e7bb1c 100644
--- a/src/knx_facade.cpp
+++ b/src/knx_facade.cpp
@@ -40,8 +40,8 @@
         // predefined global instance for TP or IP
         #if MASK_VERSION == 0x07B0
             KnxFacade<Samd51Platform, Bau07B0> knx(buttonEvent);
-        #elif MASK_VERSION == 0x57B0
-            KnxFacade<Samd51Platform, Bau57B0> knx(buttonEvent);
+        // #elif MASK_VERSION == 0x57B0
+        //     KnxFacade<Samd51Platform, Bau57B0> knx(buttonEvent);
         #else
             #error "Mask version not supported on SAMD51"
         #endif
diff --git a/src/knx_facade.h b/src/knx_facade.h
index 64ed039..d7961ad 100644
--- a/src/knx_facade.h
+++ b/src/knx_facade.h
@@ -477,8 +477,8 @@ template <class P, class B> class KnxFacade : private SaveRestore
         // predefined global instance for TP or IP
         #if MASK_VERSION == 0x07B0
             extern KnxFacade<Samd51Platform, Bau07B0> knx;
-        #elif MASK_VERSION == 0x57B0
-            extern KnxFacade<Samd51Platform, Bau57B0> knx;
+        // #elif MASK_VERSION == 0x57B0
+        //     extern KnxFacade<Samd51Platform, Bau57B0> knx;
         #else
             #error "Mask version not supported on SAMD51"
         #endif