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-rw-r--r--callerid.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/callerid.h b/callerid.h
index 6fffd07..d1e5b46 100644
--- a/callerid.h
+++ b/callerid.h
@@ -9,6 +9,6 @@
** **
\*****************************************************************************/
-char *nationalize_callerinfo(char *string, int *type, char *national, char *international);
-char *numberrize_callerinfo(char *string, int type, char *national, char *international);
+const char *nationalize_callerinfo(const char *string, int *type, const char *national, const char *international);
+const char *numberrize_callerinfo(const char *string, int type, const char *national, const char *international);