diff --git a/include/picrin/value.h b/include/picrin/value.h
index 410f2b06..0ee56e30 100644
--- a/include/picrin/value.h
+++ b/include/picrin/value.h
@@ -35,4 +35,6 @@ struct pic_symbol {
   char *name;
 };
 
+pic_value pic_obj_value(struct pic_object *obj);
+
 #endif
diff --git a/src/value.c b/src/value.c
new file mode 100644
index 00000000..778d2bc9
--- /dev/null
+++ b/src/value.c
@@ -0,0 +1,11 @@
+#include "picrin.h"
+
+pic_value
+pic_obj_value(struct pic_object *obj)
+{
+  pic_value v;
+
+  v.vtype = PIC_VTYPE_HEAP;
+  v.u.data = obj;
+  return v;
+}