diff --git a/include/groundvm.h b/include/groundvm.h
index 61f6e6d..13c8fc1 100644
--- a/include/groundvm.h
+++ b/include/groundvm.h
@@ -31,6 +31,7 @@ typedef enum ListAccessStatus {
 
 struct GroundValue;
 struct GroundFunction;
+struct GroundStruct;
 
 struct List;
 
@@ -58,8 +59,7 @@ typedef struct GroundError {
  */
 typedef struct GroundValue {
     GroundValueType type;
-    // This line seems to be causing issues with extlibs
-    // struct GroundStruct* customType;
+    struct GroundStruct* customType;
     union {
         int64_t intVal;
         double doubleVal;
diff --git a/src/types.h b/src/types.h
index 600322c..1639cd2 100644
--- a/src/types.h
+++ b/src/types.h
@@ -62,7 +62,6 @@ typedef struct GroundError {
  */
 typedef struct GroundValue {
     GroundValueType type;
-    struct GroundStruct* customType;
     union {
         int64_t intVal;
         double doubleVal;
@@ -75,6 +74,7 @@ typedef struct GroundValue {
         struct GroundStruct* structVal;
         struct GroundObject* customVal;
     } data;
+    struct GroundStruct* customType;
 } GroundValue;
 
 /*