diff --git a/ctgputtylib.h b/ctgputtylib.h
index f0f0b43..3b4fe55 100644
--- a/ctgputtylib.h
+++ b/ctgputtylib.h
@@ -82,6 +82,7 @@ typedef struct
   const char *fxp_error_message; // accessed by host application too
   int fxp_errtype; // accessed by host application too
 
+#if defined(CALLBACK_MALLOC) || defined(DEBUG_MALLOC)
   void* (*malloc_callback) (size_t size);
   void (*free_callback) (void* ptr);
   void* (*realloc_callback)(void* ptr, size_t new_size);
@@ -91,6 +92,7 @@ typedef struct
   void* (*debug_realloc_callback)(void* ptr, size_t new_size, const char* filename, const int line);
 
   bool usememorycallbacks;
+#endif
 
   // STRICTLY LIBRARY PRIVATE FIELDS FOLLOW
   char reservedbytes[301];
diff --git a/tgputtylib/windows/tgputtylib.dll b/tgputtylib/windows/tgputtylib.dll
deleted file mode 100644
index 23b98ed..0000000
Binary files a/tgputtylib/windows/tgputtylib.dll and /dev/null differ
diff --git a/tgputtylib/windows/tgputtylib.lib b/tgputtylib/windows/tgputtylib.lib
deleted file mode 100644
index 63a427e..0000000
Binary files a/tgputtylib/windows/tgputtylib.lib and /dev/null differ