diff --git a/cpu/sam0_common/include/cpu_conf.h b/cpu/sam0_common/include/cpu_conf.h
index dd697e8e37..05b9f3ac69 100644
--- a/cpu/sam0_common/include/cpu_conf.h
+++ b/cpu/sam0_common/include/cpu_conf.h
@@ -39,6 +39,8 @@
 #include "vendor/samd21/include_d/samd21.h"
 #elif defined(CPU_SAMD51)
 #include "vendor/samd51/include/samd51.h"
+#elif defined(CPU_SAME51)
+#include "vendor/same51/include/same51.h"
 #elif defined(CPU_SAME54)
 #include "vendor/same54/include/same54.h"
 #elif defined(CPU_SAML10)
diff --git a/cpu/samd5x/Makefile.include b/cpu/samd5x/Makefile.include
index 67240b2af1..b8ef66a6e4 100644
--- a/cpu/samd5x/Makefile.include
+++ b/cpu/samd5x/Makefile.include
@@ -1,6 +1,9 @@
 ifneq (,$(filter samd51%,$(CPU_MODEL)))
   CFLAGS += -DCPU_SAMD51
 endif
+ifneq (,$(filter same51%,$(CPU_MODEL)))
+  CFLAGS += -DCPU_SAME51
+endif
 ifneq (,$(filter same54%,$(CPU_MODEL)))
   CFLAGS += -DCPU_SAME54
 endif