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-rw-r--r--src/base/bitunion.hh3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/base/bitunion.hh b/src/base/bitunion.hh
index f640fa3b1..190c1a5e1 100644
--- a/src/base/bitunion.hh
+++ b/src/base/bitunion.hh
@@ -85,6 +85,9 @@ namespace BitfieldBackend
template<int first, int last=first>
class Bitfield : public BitfieldBase<Type>
{
+ static_assert(first >= last,
+ "Bitfield ranges must be specified as <msb, lsb>");
+
public:
operator const uint64_t () const
{