--- a/filters/qtaif.c
+++ b/filters/qtaif.c
@@ -28,7 +28,7 @@
             return 3;
         }
     }
-    taibuf[TAI_STR_LEN] =  '\0';
+    taibuf[TAI_STR_LEN -1] =  '\0';
     
     printf("%s\n", taibuf);