diff --git a/endian.hpp b/endian.hpp
index d23319d4..a61ca2d8 100644
--- a/endian.hpp
+++ b/endian.hpp
@@ -17,15 +17,10 @@
 
 namespace cruft {
     //-------------------------------------------------------------------------
-    template <typename T>
-    constexpr T
-    bswap (T) noexcept;
-
     // CXX: Update using "if constexpr" when available. It doesn't seem to be
     // worth the dicking about to use enable_if_t to differentiate the
     // signed/unsigned cases.
     #define SIGNED_BSWAP(S)                 \
-    template <>                             \
     constexpr                               \
     int##S##_t                              \
     bswap (int##S##_t v) noexcept {         \
@@ -41,12 +36,12 @@ namespace cruft {
     SIGNED_BSWAP(32)
     SIGNED_BSWAP(64)
 
-    template <> constexpr  int8_t bswap ( int8_t v) noexcept { return v; }
-    template <> constexpr uint8_t bswap (uint8_t v) noexcept { return v; }
+    constexpr  int8_t bswap ( int8_t v) noexcept { return v; }
+    constexpr uint8_t bswap (uint8_t v) noexcept { return v; }
 
-    template <> constexpr uint16_t bswap (uint16_t v) noexcept { return __builtin_bswap16 (v); }
-    template <> constexpr uint32_t bswap (uint32_t v) noexcept { return __builtin_bswap32 (v); }
-    template <> constexpr uint64_t bswap (uint64_t v) noexcept { return __builtin_bswap64 (v); }
+    constexpr uint16_t bswap (uint16_t v) noexcept { return __builtin_bswap16 (v); }
+    constexpr uint32_t bswap (uint32_t v) noexcept { return __builtin_bswap32 (v); }
+    constexpr uint64_t bswap (uint64_t v) noexcept { return __builtin_bswap64 (v); }
 
 
     // use a type-punning union to punt the byte swapping operation to the
@@ -54,7 +49,6 @@ namespace cruft {
     //
     // this is debatably safe under production compilers like gcc + clang
     // despite what the standard may say about unions.
-    template <>
     constexpr float
     bswap (float v) noexcept
     {