diff --git a/channels/chan_zap.c b/channels/chan_zap.c
index 284f70f435..834f9b2bf9 100755
--- a/channels/chan_zap.c
+++ b/channels/chan_zap.c
@@ -500,7 +500,7 @@ static int cidrings[] = {
 #define CANPROGRESSDETECT(p) (ISTRUNK(p) || (p->sig & (SIG_EM | SIG_SF)) /* || (p->sig & __ZT_SIG_FXO) */)
 
 /* translate between PRI causes and asterisk's */
-int hangup_pri2cause(int cause)
+static int hangup_pri2cause(int cause)
 {
 	switch(cause) {
 #ifdef ZAPATA_PRI
diff --git a/include/asterisk/causes.h b/include/asterisk/causes.h
index 470510981c..8513628821 100755
--- a/include/asterisk/causes.h
+++ b/include/asterisk/causes.h
@@ -1,9 +1,20 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Internal Asterisk's hangup causes
+ *
+ * Copyright (C) 2003, Digium
+ *
+ * Martin Pycko <martinp@digium.com>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+
+
 #define AST_CAUSE_NOTDEFINED	0
 #define AST_CAUSE_NORMAL	1
 #define AST_CAUSE_BUSY		2
 #define AST_CAUSE_FAILURE	3
 
-/* Translate the pri's cause number to asterisk's */
-int hangup_pri2cause(int cause);
-