diff --git a/firmware/crt0.S b/firmware/crt0.S
index 9e1aba58ce..00146cbd49 100644
--- a/firmware/crt0.S
+++ b/firmware/crt0.S
@@ -489,6 +489,9 @@ irq_handler:
     lea     MBAR,%a0
     lea     MBAR2,%a1
         
+    moveq.l #0,%d0
+    move.l  %d0,(0x180,%a1)  /* PLLCR = 0 */
+
     /* 64K DMA-capable SRAM at 0x10000000
        DMA is enabled and has priority in both banks
        All types of accesses are allowed