diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp
index 5f3efaaf1..2946611cf 100644
--- a/include/nlohmann/detail/input/binary_reader.hpp
+++ b/include/nlohmann/detail/input/binary_reader.hpp
@@ -241,7 +241,7 @@ class binary_reader
 
             case 0x08: // boolean
             {
-                return sax->boolean(static_cast<bool>(get()));
+                return sax->boolean(get() != 0);
             }
 
             case 0x0A: // null
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 7c31d212f..016ba39d7 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -6582,7 +6582,7 @@ class binary_reader
 
             case 0x08: // boolean
             {
-                return sax->boolean(static_cast<bool>(get()));
+                return sax->boolean(get() != 0);
             }
 
             case 0x0A: // null