diff --git a/include/gsl/span b/include/gsl/span
index 1cb9e84..fcc74aa 100644
--- a/include/gsl/span
+++ b/include/gsl/span
@@ -519,7 +519,7 @@ public:
     template <
         class OtherElementType, std::size_t OtherExtent, std::size_t SpanExtent = Extent,
         std::enable_if_t<
-            (SpanExtent == dynamic_extent || OtherExtent == dynamic_extent) &&
+            (SpanExtent == dynamic_extent || SpanExtent == OtherExtent) &&
             details::is_allowed_element_type_conversion<OtherElementType, element_type>::value, int> = 0>
     constexpr span(const span<OtherElementType, OtherExtent>& other) noexcept
         : storage_(other.data(), details::extent_type<OtherExtent>(other.size()))
@@ -542,7 +542,7 @@ public:
     constexpr span<element_type, Count> first() const noexcept
     {
         Expects(Count <= size());
-        return span<element_type, Count>(data(), Count);
+        return span<element_type, Count>{data(), Count};
     }
 
     template <std::size_t Count>
@@ -552,7 +552,7 @@ public:
         constexpr span<element_type, Count> last() const noexcept
     {
         Expects(Count <= size());
-        return span<element_type, Count>(data() + (size() - Count), Count);
+        return span<element_type, Count>{data() + (size() - Count), Count};
     }
 
     template <std::size_t Offset, std::size_t Count = dynamic_extent>
diff --git a/tests/span_tests.cpp b/tests/span_tests.cpp
index ae4503e..44198a6 100644
--- a/tests/span_tests.cpp
+++ b/tests/span_tests.cpp
@@ -1144,7 +1144,7 @@ TEST(span_test, from_array_constructor)
 
      // you can convert statically
      {
-         const span<int, 2> s2(&arr[0], 2);
+         const span<int, 2> s2{&arr[0], 2};
          static_cast<void>(s2);
      }
      {
@@ -1180,7 +1180,7 @@ TEST(span_test, from_array_constructor)
  #endif
      {
          auto f = [&]() {
-             const span<int, 4> _s4(arr2, 2);
+             span<int, 4> _s4{arr2, 2};
              static_cast<void>(_s4);
          };
          EXPECT_DEATH(f(), deathstring);