diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp
index 2946611c..d2052234 100644
--- a/include/nlohmann/detail/input/binary_reader.hpp
+++ b/include/nlohmann/detail/input/binary_reader.hpp
@@ -820,7 +820,7 @@ class binary_reader
     */
     bool get_cbor_object(const std::size_t len)
     {
-        if (not JSON_UNLIKELY(sax->start_object(len)))
+        if (JSON_UNLIKELY(not sax->start_object(len)))
         {
             return false;
         }
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index d85f40f7..228f99ea 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -7273,7 +7273,7 @@ class binary_reader
     */
     bool get_cbor_object(const std::size_t len)
     {
-        if (not JSON_UNLIKELY(sax->start_object(len)))
+        if (JSON_UNLIKELY(not sax->start_object(len)))
         {
             return false;
         }