diff --git a/pymlac/blockpunch.asm b/pymlac/blockpunch.asm
index c4bd68f..a27af18 100644
--- a/pymlac/blockpunch.asm
+++ b/pymlac/blockpunch.asm
@@ -94,7 +94,7 @@ pbloop  lac     *fad    ;
 ; Punch leader
 ;------------------------
         org     start+0120 ; 037540 + 0120 = 037660
-pldr    lwc     010     ; >was 012
+pldr    lwc     07      ; we want 16 bytes of leader (8 words)
         dac     wtb     ; store leader count
         cla             ;
         jms     pword   ;