diff --git a/include/snipplib/containers/snplib_hmap.h b/include/snipplib/containers/snplib_hmap.h
index e38d177..cac2b87 100644
--- a/include/snipplib/containers/snplib_hmap.h
+++ b/include/snipplib/containers/snplib_hmap.h
@@ -461,11 +461,11 @@ public:
     // trivial conversional functions
 
     template <typename VT, typename UT>
-        requires requires(VT v, UT u) { v = u; }
+        requires requires(VT v, UT u) { u = v; }
     inline static auto trivial_conv_from = [](VT const& val) -> hmap_expected_t<UT> { return static_cast<UT>(val); };
 
     template <typename VT, typename UT>
-        requires requires(VT v, UT u) { u = v; }
+        requires requires(VT v, UT u) { v = u; }
     inline static auto trivial_conv_to = [](UT const& uval) -> hmap_expected_t<VT> { return static_cast<VT>(uval); };
 
     hmap() = default;