diff --git a/3rdparty/catch/catch_amalgamated.hpp b/3rdparty/catch/catch_amalgamated.hpp
index 7a21dd5..c61489e 100644
--- a/3rdparty/catch/catch_amalgamated.hpp
+++ b/3rdparty/catch/catch_amalgamated.hpp
@@ -1520,7 +1520,7 @@ namespace Catch {
             *reinterpret_cast<char volatile*>(p) = *reinterpret_cast<char const volatile*>(p);
         }
         // TODO equivalent keep_memory()
-#if defined(_MSVC_VER)
+#if defined(_MSC_VER)
 #pragma optimize("", on)
 #endif