diff --git a/src/json.hpp b/src/json.hpp
index f9a928202..725310f6d 100644
--- a/src/json.hpp
+++ b/src/json.hpp
@@ -82,7 +82,7 @@ SOFTWARE.
 #endif
 
 // allow to disable exceptions
-#if (__cpp_exceptions || defined(_CPPUNWIND)) && not defined(JSON_NOEXCEPTION)
+#if (defined(__cpp_exceptions) || defined(_CPPUNWIND)) && not defined(JSON_NOEXCEPTION)
     #define JSON_THROW(exception) throw exception
     #define JSON_TRY try
     #define JSON_CATCH(exception) catch(exception)
diff --git a/src/json.hpp.re2c b/src/json.hpp.re2c
index 2cad18aa4..9172d2bfa 100644
--- a/src/json.hpp.re2c
+++ b/src/json.hpp.re2c
@@ -82,7 +82,7 @@ SOFTWARE.
 #endif
 
 // allow to disable exceptions
-#if (__cpp_exceptions || defined(_CPPUNWIND)) && not defined(JSON_NOEXCEPTION)
+#if (defined(__cpp_exceptions) || defined(_CPPUNWIND)) && not defined(JSON_NOEXCEPTION)
     #define JSON_THROW(exception) throw exception
     #define JSON_TRY try
     #define JSON_CATCH(exception) catch(exception)