diff --git a/src/ld65/cfg/c128.cfg b/src/ld65/cfg/c128.cfg
index e5259dead..22eaa951f 100644
--- a/src/ld65/cfg/c128.cfg
+++ b/src/ld65/cfg/c128.cfg
@@ -20,6 +20,7 @@ FEATURES {
 	    type = destructor,
 	    label = __DESTRUCTOR_TABLE__,
 	    count = __DESTRUCTOR_COUNT__;
+    /* condes functions with type 2 are called in the interrupt */
     CONDES: segment = RODATA,
 	    type = 2,
 	    label = __IRQFUNC_TABLE__,