Index: channels/chan_iax2.c
===================================================================
--- channels/chan_iax2.c	(revision 87651)
+++ channels/chan_iax2.c	(working copy)
@@ -6019,7 +6019,7 @@
 				}
 			}
 			if (prev)
-				free(prev);
+				ast_free(prev);
 			ies->vars = NULL;
 			ast_channel_datastore_add(p->owner, variablestore);
 		} else {
@@ -7781,7 +7781,7 @@
 							}
 						}
 						if (prev)
-							free(prev);
+							ast_free(prev);
 						ies.vars = NULL;
 						ast_channel_datastore_add(c, variablestore);
 					} else {
@@ -8533,7 +8533,7 @@
 										}
 									}
 									if (prev)
-										free(prev);
+										ast_free(prev);
 									ies.vars = NULL;
 									ast_channel_datastore_add(c, variablestore);
 								} else {