diff --git a/channels/chan_iax2.c b/channels/chan_iax2.c
index 404cd44a83..4d53ca3ab7 100644
--- a/channels/chan_iax2.c
+++ b/channels/chan_iax2.c
@@ -1500,7 +1500,7 @@ static int __find_callno(unsigned short callno, unsigned short dcallno, struct s
 					res = x;
 				}
 			}
-			if (res && !return_locked)
+			if (!res || (res && !return_locked))
 				ast_mutex_unlock(&iaxsl[x]);
 		}
 		for (x=TRUNK_CALL_START;(res < 1) && (x<maxtrunkcall);x++) {
@@ -1511,7 +1511,7 @@ static int __find_callno(unsigned short callno, unsigned short dcallno, struct s
 					res = x;
 				}
 			}
-			if (res && !return_locked)
+			if (!res || (res && !return_locked))
 				ast_mutex_unlock(&iaxsl[x]);
 		}
 	}