diff --git a/src/target/samd.c b/src/target/samd.c
index 6beb4cd73e2..69275626f1e 100644
--- a/src/target/samd.c
+++ b/src/target/samd.c
@@ -135,9 +135,9 @@ const command_s samd_cmd_list[] = {
 #define SAMD_DID_DEVSEL_POS    0U
 #define SAMD_DID_REVISION_MASK 0x0fU
 #define SAMD_DID_REVISION_POS  8U
-#define SAMD_DID_SERIES_MASK   0x1fU
+#define SAMD_DID_SERIES_MASK   0x3fU
 #define SAMD_DID_SERIES_POS    16U
-#define SAMD_DID_FAMILY_MASK   0x3fU
+#define SAMD_DID_FAMILY_MASK   0x1fU
 #define SAMD_DID_FAMILY_POS    23U
 
 /* Peripheral ID */