--- channel.c
+++ channel.c
@@ -98,7 +98,11 @@
 		: 0;
 }
 
-#if ASTERISK_VERSION_NUM >= 100000 /* 10+ */
+#if ASTERISK_VERSION_NUM >= 110000 /* 11+ */
+
+static struct ast_channel * channel_request (attribute_unused const char * type, struct ast_format_cap * cap, const struct ast_channel *requestor, const char * data, int * cause)
+
+#elif ASTERISK_VERSION_NUM >= 100000 /* 10+ */
 
 static struct ast_channel * channel_request (attribute_unused const char * type, struct ast_format_cap * cap, const struct ast_channel *requestor, void * data, int * cause)
 
@@ -185,7 +189,7 @@
 }
 
 #/* */
-static int channel_call (struct ast_channel* channel, char* dest, attribute_unused int timeout)
+static int channel_call (struct ast_channel* channel, const char* dest, attribute_unused int timeout)
 {
 	struct cpvt* cpvt = ast_channel_tech_pvt(channel);
 	struct pvt* pvt;
@@ -935,7 +939,7 @@
 }
 
 #/* FIXME: must modify in conjuction with state on call not whole device? */
-static int channel_devicestate (void* data)
+static int channel_devicestate (const char* data)
 {
 	char*	device;
 	struct pvt*	pvt;