diff --git a/arch/ppc/qemu/methods.c b/arch/ppc/qemu/methods.c
index 930b47c..a423b9f 100644
--- a/arch/ppc/qemu/methods.c
+++ b/arch/ppc/qemu/methods.c
@@ -126,7 +126,8 @@
 }
 
 /* ( -- ms ) */
-#define TIMER_FREQUENCY 16600000ULL
+/* From drivers/timer.c */
+extern unsigned long timer_freq;
 
 static void
 ciface_milliseconds( unsigned long args[], unsigned long ret[] )
@@ -146,7 +147,7 @@
 		: "cc");
 
 	ticks = (((unsigned long long)tbu) << 32) | (unsigned long long)tbl;
-	msecs = (1000 * ticks) / TIMER_FREQUENCY;
+	msecs = (1000 * ticks) / timer_freq;
 	PUSH( msecs );
 }