diff --git a/Src/IACore/inc/IACore/PCH.hpp b/Src/IACore/inc/IACore/PCH.hpp
index af89d51..513dde5 100644
--- a/Src/IACore/inc/IACore/PCH.hpp
+++ b/Src/IACore/inc/IACore/PCH.hpp
@@ -220,12 +220,11 @@
 
 // Templates and Aliases
 #ifdef __cplusplus
-#define ALIAS_FUNCTION(alias, function)                                                                     \
-    template<typename... Args>                                                                              \
-    auto alias(Args &&...args) -> decltype(function(std::forward<Args>(args)...))                           \
-    {                                                                                                       \
-        return function(std::forward<Args>(args)...);                                                       \
-    }
+#    define ALIAS_FUNCTION(alias, function)                                                                            \
+        template<typename... Args> auto alias(Args &&...args) -> decltype(function(std::forward<Args>(args)...))       \
+        {                                                                                                              \
+            return function(std::forward<Args>(args)...);                                                              \
+        }
 
 #    define ALIAS_TEMPLATE_FUNCTION(t, alias, function)                                                                \
         template<typename t, typename... Args>                                                                         \
@@ -271,6 +270,10 @@
 #define IA_CONCAT(x, y) IA_CONCAT_IMPL(x, y)
 #define IA_UNIQUE_NAME(prefix) IA_CONCAT(prefix, __LINE__)
 
+#define ENSURE_BINARY_COMPATIBILITY(A, B)                                                                              \
+    static_assert(sizeof(A) == sizeof(B),                                                                              \
+                  #A ", " #B " size mismatch! Do not add virtual functions or new member variables.");
+
 // -----------------------------------------------------------------------------
 // Limits & Versioning
 // -----------------------------------------------------------------------------