diff --git a/include/span.h b/include/span.h
index 6ecad64..e922eac 100644
--- a/include/span.h
+++ b/include/span.h
@@ -127,7 +127,8 @@ public:
 
     template <typename ValueType,
               typename = std::enable_if_t<(Rank == 1) &&
-                                          std::is_convertible<ValueType, value_type>::value>>
+                                          std::is_convertible<ValueType, value_type>::value &&
+                                          !std::is_integral<ValueType>::value>>
     constexpr index(ValueType value) noexcept
     {
         elems[0] = value;