diff --git a/libretro-common/include/streams/interface_stream.h b/libretro-common/include/streams/interface_stream.h
index 3c106df27e..422768aee1 100644
--- a/libretro-common/include/streams/interface_stream.h
+++ b/libretro-common/include/streams/interface_stream.h
@@ -53,4 +53,7 @@ void *intfstream_init(intfstream_info_t *info);
 bool intfstream_resize(intfstream_internal_t *intf,
       intfstream_info_t *info);
 
+bool intfstream_open(intfstream_internal_t *intf,
+      const char *path, unsigned mode, ssize_t len);
+
 #endif
diff --git a/libretro-common/streams/interface_stream.c b/libretro-common/streams/interface_stream.c
index b183e2cc58..d07c983012 100644
--- a/libretro-common/streams/interface_stream.c
+++ b/libretro-common/streams/interface_stream.c
@@ -8,6 +8,11 @@ struct intfstream_internal
 {
    enum intfstream_type type;
 
+   struct
+   {
+      RFILE *fp;
+   } file;
+
    struct
    {
       struct
@@ -15,6 +20,7 @@ struct intfstream_internal
          uint8_t *data;
          unsigned size;
       } buf;
+      memstream_t *fp;
    } memory;
 };
 
@@ -39,6 +45,28 @@ bool intfstream_resize(intfstream_internal_t *intf, intfstream_info_t *info)
    return true;
 }
 
+bool intfstream_open(intfstream_internal_t *intf, const char *path, unsigned mode, ssize_t len)
+{
+   if (!intf)
+      return false;
+
+   switch (intf->type)
+   {
+      case INTFSTREAM_FILE:
+         intf->file.fp = filestream_open(path, mode, len);
+         if (!intf->file.fp)
+            return false;
+         break;
+      case INTFSTREAM_MEMORY:
+         intf->memory.fp = memstream_open();
+         if (!intf->memory.fp)
+            return false;
+         break;
+   }
+
+   return true;
+}
+
 void *intfstream_init(intfstream_info_t *info)
 {
    intfstream_internal_t *intf = NULL;