--- original/zaptel-base.c	2007-02-20 23:25:21.000000000 -0500
+++ zaptel-base.c	2007-03-30 11:09:33.000000000 -0400
@@ -4803,7 +4803,7 @@ static inline void __zt_process_getaudio
 				ms->echostate = ECHO_STATE_IDLE;
 				ms->echolastupdate = 0;
 				ms->echotimer = 0;
-				kfree(ms->ec);
+				echo_can_free(ms->ec);
 				ms->ec = NULL;
 				break;
 			}
@@ -5658,7 +5658,7 @@ static inline void __zt_process_putaudio
 				ms->echostate = ECHO_STATE_IDLE;
 				ms->echolastupdate = 0;
 				ms->echotimer = 0;
-				kfree(ms->ec);
+				echo_can_free(ms->ec);
 				ms->ec = NULL;
 				break;
 			}