diff --git a/src/interpreter.c b/src/interpreter.c
index fe76d0c..0e98a30 100644
--- a/src/interpreter.c
+++ b/src/interpreter.c
@@ -382,6 +382,7 @@ GroundStruct parseStruct(GroundProgram* in, GroundScope* scope, size_t errorOffs
                         gv.type = CUSTOM;
                         gv.data.customVal = malloc(sizeof(GroundObject));
                         *gv.data.customVal = createObject(*gstruct);
+                        gv.customType = gstruct;
                         break;
                     }
                     case NONE: {
@@ -1981,6 +1982,7 @@ GroundValue interpretGroundInstruction(GroundInstruction inst, GroundScope* scop
                     gv.type = CUSTOM;
                     gv.data.customVal = malloc(sizeof(GroundObject));
                     *gv.data.customVal = createObject(*gstruct);
+                    gv.customType = gstruct;
                     break;
                 }
                 case NONE: {