diff --git a/include/groundvm.h b/include/groundvm.h
index 7fbad50..da719f9 100644
--- a/include/groundvm.h
+++ b/include/groundvm.h
@@ -69,7 +69,8 @@ typedef struct GroundValue {
         GroundError errorVal;
         struct GroundFunction* fnVal;
         struct GroundStruct* structVal;
-        struct GroundObject* customVal;
+        // This line seems to cause issues with external libraries.
+        // struct GroundObject* customVal;
     } data;
 } GroundValue;