diff --git a/include/sudo_plugin.h b/include/sudo_plugin.h
index e66a5346a..2c66e653f 100644
--- a/include/sudo_plugin.h
+++ b/include/sudo_plugin.h
@@ -93,18 +93,6 @@ struct io_plugin {
     int (*log_stderr)(const char *buf, unsigned int len);
 };
 
-/* Internal use only */
-struct generic_plugin {
-    unsigned int type;
-    unsigned int version;
-    int (*open)(unsigned int version, sudo_conv_t conversation,
-	char * const settings[], char * const user_info[],
-	char * const user_env[]);
-    void (*close)(int exit_status, int error); /* wait status or error */
-    int (*show_version)(int verbose);
-    /* the rest depends on the type... */
-};
-
 /* Sudoers group plugin version major/minor */
 #define GROUP_API_VERSION_MAJOR 1
 #define GROUP_API_VERSION_MINOR 0
diff --git a/src/sudo_plugin_int.h b/src/sudo_plugin_int.h
index c2697d1c8..76ee1fe93 100644
--- a/src/sudo_plugin_int.h
+++ b/src/sudo_plugin_int.h
@@ -17,6 +17,15 @@
 #ifndef _SUDO_PLUGIN_INT_H
 #define _SUDO_PLUGIN_INT_H
 
+/*
+ * All plugin structures start with a type and a version.
+ */
+struct generic_plugin {
+    unsigned int type;
+    unsigned int version;
+    /* the rest depends on the type... */
+};
+
 /*
  * Backwards-compatible structures for API bumps.
  */