diff --git a/src/adc/adcconst.h b/src/adc/adcconst.h
index 35d6564..f78db84 100644
--- a/src/adc/adcconst.h
+++ b/src/adc/adcconst.h
@@ -20,7 +20,11 @@
 #ifndef HAVE_UHUB_ADC_CONSTANTS_H
 #define HAVE_UHUB_ADC_CONSTANTS_H
 
+#ifndef SID_T_DEFINED
 typedef uint32_t sid_t;
+#define SID_T_DEFINED
+#endif
+
 typedef uint32_t fourcc_t;
 
 /* Internal uhub limit */
diff --git a/src/plugin_api/handle.h b/src/plugin_api/handle.h
index f9004f0..39d1e83 100644
--- a/src/plugin_api/handle.h
+++ b/src/plugin_api/handle.h
@@ -20,69 +20,14 @@
 #ifndef HAVE_UHUB_PLUGIN_HANDLE_H
 #define HAVE_UHUB_PLUGIN_HANDLE_H
 
+/**
+ * This file describes the interface a uhub uses to interact with plugins.
+ */
+
 #include "system.h"
 #include "util/credentials.h"
 #include "util/ipcalc.h"
-
-#define PLUGIN_API_VERSION 1
-
-#ifndef MAX_NICK_LEN
-#define MAX_NICK_LEN 64
-#endif
-
-#ifndef MAX_PASS_LEN
-#define MAX_PASS_LEN 64
-#endif
-
-#ifndef MAX_CID_LEN
-#define MAX_CID_LEN 39
-#endif
-
-
-struct plugin_handle;
-
-struct plugin_user
-{
-	unsigned int sid;
-	const char* nick;
-	const char* cid;
-	const char* user_agent;
-	struct ip_addr_encap addr;
-	enum auth_credentials credentials;
-};
-
-enum plugin_status
-{
-	st_default = 0,    /* Use default */
-	st_allow = 1,      /* Allow action */
-	st_deny = -1,      /* Deny action */
-};
-
-typedef enum plugin_status plugin_st;
-
-struct auth_info
-{
-	char nickname[MAX_NICK_LEN+1];
-	char password[MAX_PASS_LEN+1];
-	enum auth_credentials credentials;
-};
-
-enum ban_flags
-{
-	ban_nickname = 0x01, /* Nickname is banned */
-	ban_cid      = 0x02, /* CID is banned */
-	ban_ip       = 0x04, /* IP address (range) is banned */
-};
-
-struct ban_info
-{
-	unsigned int flags;                 /* See enum ban_flags. */
-	char nickname[MAX_NICK_LEN+1];      /* Nickname - only defined if (ban_nickname & flags). */
-	char cid[MAX_CID_LEN+1];            /* CID - only defined if (ban_cid & flags). */
-	struct ip_addr_encap ip_addr_lo;    /* Low IP address of an IP range */
-	struct ip_addr_encap ip_addr_hi;    /* High IP address of an IP range */
-	time_t expiry;                      /* Time when the ban record expires */
-};
+#include "plugin_api/types.h"
 
 typedef plugin_st (*on_chat_msg_t)(struct plugin_handle*, struct plugin_user* from, const char* message);
 typedef plugin_st (*on_private_msg_t)(struct plugin_handle*, struct plugin_user* from, struct plugin_user* to, const char* message);
@@ -142,7 +87,6 @@ struct plugin_funcs
 	// Login check functions
 	on_check_ip_early_t     login_check_ip_early;
 	on_check_ip_late_t      login_check_ip_late;
-
 };
 
 struct plugin_handle
@@ -158,6 +102,7 @@ struct plugin_handle
 	struct plugin_funcs funcs;
 };
 
+
 #define PLUGIN_INITIALIZE(PTR, NAME, VERSION, DESCRIPTION) \
 	do { \
 		PTR->name = NAME; \
diff --git a/src/plugin_api/types.h b/src/plugin_api/types.h
new file mode 100644
index 0000000..2094144
--- /dev/null
+++ b/src/plugin_api/types.h
@@ -0,0 +1,91 @@
+/*
+ * uhub - A tiny ADC p2p connection hub
+ * Copyright (C) 2007-2010, Jan Vidar Krey
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef HAVE_UHUB_PLUGIN_TYPES_H
+#define HAVE_UHUB_PLUGIN_TYPES_H
+
+#define PLUGIN_API_VERSION 1
+
+#ifndef MAX_NICK_LEN
+#define MAX_NICK_LEN 64
+#endif
+
+#ifndef MAX_PASS_LEN
+#define MAX_PASS_LEN 64
+#endif
+
+#ifndef MAX_CID_LEN
+#define MAX_CID_LEN 39
+#endif
+
+#ifndef MAX_UA_LEN
+#define MAX_UA_LEN   32
+#endif
+
+#ifndef SID_T_DEFINED
+typedef uint32_t sid_t;
+#define SID_T_DEFINED
+#endif
+
+struct plugin_handle;
+
+struct plugin_user
+{
+	sid_t sid;
+	char nick[MAX_NICK_LEN+1];
+	char cid[MAX_CID_LEN+1];
+	char user_agent[MAX_UA_LEN+1];
+	struct ip_addr_encap addr;
+	enum auth_credentials credentials;
+};
+
+enum plugin_status
+{
+	st_default = 0,    /* Use default */
+	st_allow = 1,      /* Allow action */
+	st_deny = -1,      /* Deny action */
+};
+
+typedef enum plugin_status plugin_st;
+
+struct auth_info
+{
+	char nickname[MAX_NICK_LEN+1];
+	char password[MAX_PASS_LEN+1];
+	enum auth_credentials credentials;
+};
+
+enum ban_flags
+{
+	ban_nickname = 0x01, /* Nickname is banned */
+	ban_cid      = 0x02, /* CID is banned */
+	ban_ip       = 0x04, /* IP address (range) is banned */
+};
+
+struct ban_info
+{
+	unsigned int flags;                 /* See enum ban_flags. */
+	char nickname[MAX_NICK_LEN+1];      /* Nickname - only defined if (ban_nickname & flags). */
+	char cid[MAX_CID_LEN+1];            /* CID - only defined if (ban_cid & flags). */
+	struct ip_addr_encap ip_addr_lo;    /* Low IP address of an IP range */
+	struct ip_addr_encap ip_addr_hi;    /* High IP address of an IP range */
+	time_t expiry;                      /* Time when the ban record expires */
+};
+
+#endif /* HAVE_UHUB_PLUGIN_TYPES_H */