diff --git a/include/cow.h b/include/cow.h
index fc9abe9..6c6b370 100644
--- a/include/cow.h
+++ b/include/cow.h
@@ -24,14 +24,19 @@ cow_t* cow_clone(const cow_t* cow);
 int cow_is_fake(const cow_t* cow);
 /// Get the size of this cow area.
 size_t cow_size(const cow_t* cow);
+
 /// Get the size of this cow area by assuming layout. This should work assuming "cow_t.h"'s build assertions didn't fail and avoids an extra call.
+/// XXX: Deprecated function unpon seeing preferable codegen for using `cow_size()` over this. Use `cow_size()` instead.
+static inline
 #ifdef _COW_NO_ASSUME_ABI
-#define cow_size_unsafe(v) cow_size(v)
+#define _cow_size_unsafe(v) cow_size(v)
 #else
 // XXX: This macro is *VERY* ABI sensitive. This shouldn't be used if the ABI has changed since the build of libcow's `cow_t.h` passed its static assertions in *both* the C and C++ implementations.
 // The C++ API uses this by default for its `Cow::size()` function.
-#define cow_size_unsafe(v) *(((size_t*)(v))+1)
+#define _cow_size_unsafe(v) (*(((size_t*)(v))+1))
+	__attribute__((deprecated)) 
 #endif
+	size_t cow_size_unsafe(const cow_t* v) { return _cow_size_unsafe(v); }
 
 /// Get the `void*` pointer to the start of the area.
 #define cow_ptr(v) (*((void**)(v)))
diff --git a/include/cow.hpp b/include/cow.hpp
index 53973e0..70c6e15 100644
--- a/include/cow.hpp
+++ b/include/cow.hpp
@@ -27,7 +27,9 @@ struct Cow {
 	///
 	/// Note: This behaviour can be diabled by building with `-DCOW_NO_ASSUME_ABI`. In this case, this function calls out to the C API to determine the size.
 	/// 	  There is also likely no benefit using this over `size()` in LTO enabled builds.
-	inline size_t size_unsafe() const { return cow_size_unsafe(get_raw()); }
+	///
+	/// XXX: Deprecated function for now. It seems `size()` offers better codegen on LTO and non-LTO enabled builds.
+	[[deprecated]] inline size_t size_unsafe() const { return _cow_size_unsafe(get_raw()); }
 	
 	inline unsigned char* as_bytes() { return (unsigned char*)area(); }
 	inline const unsigned char* as_bytes() const { return (const unsigned char*)area(); }
diff --git a/src/test/main.cpp b/src/test/main.cpp
index 7f6ba64..6878d99 100644
--- a/src/test/main.cpp
+++ b/src/test/main.cpp
@@ -6,11 +6,13 @@ int main()
 {
 	Cow real(4096);
 
+
 	printf("Fast size: %lu, slow size: %lu\n", real.size_unsafe(), real.size());
 
 	Cow::Fake clone = real;
 	{
 		Cow::Fake clone2 = clone;
 	}
+	if(0) cow_size_unsafe(NULL);
 	return 0;
 }
diff --git a/vgcore.31455 b/vgcore.31455
new file mode 100644
index 0000000..dccfbc7
Binary files /dev/null and b/vgcore.31455 differ