diff --git a/include/nlohmann/detail/input/input_adapters.hpp b/include/nlohmann/detail/input/input_adapters.hpp
index 490c05877..54c97df6b 100644
--- a/include/nlohmann/detail/input/input_adapters.hpp
+++ b/include/nlohmann/detail/input/input_adapters.hpp
@@ -399,7 +399,7 @@ class input_adapter
     /// input adapter for array
     template<class T, std::size_t N>
     input_adapter(T (&array)[N])
-        : input_adapter(std::begin(array), (N > 0 && array[N - 1]) == 0 ? std::prev(std::end(array)) : std::end(array)) {}
+        : input_adapter(std::begin(array), (N > 0 && array[N - 1] == 0) ? std::prev(std::end(array)) : std::end(array)) {}
 
     /// input adapter for contiguous container
     template<class ContiguousContainer, typename
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index a0bcc3d75..afad2a8a5 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -2554,7 +2554,7 @@ class input_adapter
     /// input adapter for array
     template<class T, std::size_t N>
     input_adapter(T (&array)[N])
-        : input_adapter(std::begin(array), (N > 0 && array[N - 1]) == 0 ? std::prev(std::end(array)) : std::end(array)) {}
+        : input_adapter(std::begin(array), (N > 0 && array[N - 1] == 0) ? std::prev(std::end(array)) : std::end(array)) {}
 
     /// input adapter for contiguous container
     template<class ContiguousContainer, typename
diff --git a/test/src/unit-class_parser.cpp b/test/src/unit-class_parser.cpp
index 72a26251e..595788a4e 100644
--- a/test/src/unit-class_parser.cpp
+++ b/test/src/unit-class_parser.cpp
@@ -1634,7 +1634,7 @@ TEST_CASE("parser class")
             CHECK(j == json(true));
 
             CHECK_THROWS_WITH(json::parser(nlohmann::detail::input_adapter(std::begin(v), std::end(v))).parse(true, j),
-            "[json.exception.parse_error.101] parse error at line 1, column 5: syntax error while parsing value - invalid literal; last read: 'true<U+0000>'; expected end of input");
+                              "[json.exception.parse_error.101] parse error at line 1, column 5: syntax error while parsing value - invalid literal; last read: 'true<U+0000>'; expected end of input");
         }
 
         SECTION("from array")
@@ -1650,7 +1650,7 @@ TEST_CASE("parser class")
             uint8_t v[] = {};
             json j;
             CHECK_THROWS_WITH(json::parser(nlohmann::detail::input_adapter(v)).parse(true, j),
-            "[json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - unexpected end of input; expected '[', '{', or a literal");
+                              "[json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - unexpected end of input; expected '[', '{', or a literal");
         }