diff --git a/include/asterisk/musiconhold.h b/include/asterisk/musiconhold.h
index cb6158f7ef..ceef76cdf3 100755
--- a/include/asterisk/musiconhold.h
+++ b/include/asterisk/musiconhold.h
@@ -19,7 +19,7 @@ extern "C" {
 #endif
 
 /*! Turn on music on hold on a given channel */
-extern int ast_moh_start(struct ast_channel *chan, char *class);
+extern int ast_moh_start(struct ast_channel *chan, char *mclass);
 
 /*! Turn off music on hold on a given channel */
 extern void ast_moh_stop(struct ast_channel *chan);