diff --git a/common/albyte.h b/common/albyte.h
index f21b45ec..241ce7ad 100644
--- a/common/albyte.h
+++ b/common/albyte.h
@@ -41,11 +41,11 @@ template<typename T, REQUIRES(std::is_integral<T>::value)>                    \
 inline constexpr al::byte operator op (al::byte lhs, T rhs) noexcept          \
 { return al::byte(to_integer<unsigned int>(lhs) op static_cast<unsigned int>(rhs)); } \
 template<typename T, REQUIRES(std::is_integral<T>::value)>                    \
-inline al::byte& operator opeq (al::byte &lhs, T rhs) noexcept                \
+inline constexpr al::byte& operator opeq (al::byte &lhs, T rhs) noexcept      \
 { lhs = lhs op rhs; return lhs; }                                             \
 inline constexpr al::byte operator op (al::byte lhs, al::byte rhs) noexcept   \
 { return al::byte(lhs op to_integer<unsigned int>(rhs)); }                    \
-inline al::byte& operator opeq (al::byte &lhs, al::byte rhs) noexcept         \
+inline constexpr al::byte& operator opeq (al::byte &lhs, al::byte rhs) noexcept \
 { lhs = lhs op rhs; return lhs; }
 
 AL_DECL_OP(|, |=)
diff --git a/common/alspan.h b/common/alspan.h
index 3c65e2e8..7be07354 100644
--- a/common/alspan.h
+++ b/common/alspan.h
@@ -118,7 +118,7 @@ public:
     constexpr span(const span<U,E> &span_) noexcept : span{al::data(span_), al::size(span_)} { }
     constexpr span(const span&) noexcept = default;
 
-    span& operator=(const span &rhs) noexcept = default;
+    constexpr span& operator=(const span &rhs) noexcept = default;
 
     constexpr reference front() const { return *mData; }
     constexpr reference back() const { return *(mData+E-1); }
@@ -212,7 +212,7 @@ public:
     constexpr span(const span<U,N> &span_) noexcept : span{al::data(span_), al::size(span_)} { }
     constexpr span(const span&) noexcept = default;
 
-    span& operator=(const span &rhs) noexcept = default;
+    constexpr span& operator=(const span &rhs) noexcept = default;
 
     constexpr reference front() const { return *mData; }
     constexpr reference back() const { return *(mDataEnd-1); }