diff --git a/plugin/plugin.h b/plugin/plugin.h
index bbf212d..c5a5e89 100644
--- a/plugin/plugin.h
+++ b/plugin/plugin.h
@@ -5,6 +5,10 @@
 extern "C" {
 #endif
 
+#define GSR_PLUGIN_INTERFACE_MAJOR_VERSION 0
+#define GSR_PLUGIN_INTERFACE_MINOR_VERSION 1
+#define GSR_PLUGIN_INTERFACE_VERSION ((GSR_PLUGIN_INTERFACE_MAJOR_VERSION << 16) | GSR_PLUGIN_INTERFACE_MINOR_VERSION)
+
 #include <stdbool.h>
 
 typedef enum {