diff --git a/doc/vic20.sgml b/doc/vic20.sgml
index ff1eaba5b..7bea979d1 100644
--- a/doc/vic20.sgml
+++ b/doc/vic20.sgml
@@ -214,6 +214,14 @@ code:
 </verb></tscreen>
 
 
+<sect1>Interrupts<p>
+
+The runtime for the VIC20 uses routines marked as <tt/.CONDES/ type 2 for
+interrupt handlers. Such routines must be written as simple machine language
+subroutines and will be called automatically by the interrupt handler code
+when they are linked into a program. See the discussion of the <tt/.CONDES/
+feature in the <htmlurl url="ca65.html" name="assembler manual">.
+
 
 
 <sect>Bugs/Feedback<p>
diff --git a/src/ld65/cfg/vic20.cfg b/src/ld65/cfg/vic20.cfg
index 4dcae7e67..0c347cc46 100644
--- a/src/ld65/cfg/vic20.cfg
+++ b/src/ld65/cfg/vic20.cfg
@@ -20,6 +20,11 @@ FEATURES {
 	    type = destructor,
 	    label = __DESTRUCTOR_TABLE__,
 	    count = __DESTRUCTOR_COUNT__;
+    # condes functions with type 2 are called in the interrupt
+    CONDES: segment = RODATA,
+	    type = interruptor,
+	    label = __INTERRUPTOR_TABLE__,
+	    count = __INTERRUPTOR_COUNT__;
 }
 SYMBOLS {
     __STACKSIZE__ = $400;	# 1K stack