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-rw-r--r--src/libutil/serialise.hh2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libutil/serialise.hh b/src/libutil/serialise.hh
index 6f4f4c855..7682a0f19 100644
--- a/src/libutil/serialise.hh
+++ b/src/libutil/serialise.hh
@@ -340,7 +340,7 @@ T readNum(Source & source)
((uint64_t) buf[6] << 48) |
((uint64_t) buf[7] << 56);
- if (n > std::numeric_limits<T>::max())
+ if (n > (uint64_t)std::numeric_limits<T>::max())
throw SerialisationError("serialised integer %d is too large for type '%s'", n, typeid(T).name());
return (T) n;