diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k7.c b/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
index 7decd6a50ffa6f44a83e36dfe443522a923ad15b..f3686a5f2308ab0d9832fad24df58fb7bb4b07e9 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
@@ -565,7 +565,7 @@ static unsigned int powernow_get(unsigned int cpu)
 }
 
 
-static int __init acer_cpufreq_pst(struct dmi_system_id *d)
+static int __init acer_cpufreq_pst(const struct dmi_system_id *d)
 {
 	printk(KERN_WARNING "%s laptop with broken PST tables in BIOS detected.\n", d->ident);
 	printk(KERN_WARNING "You need to downgrade to 3A21 (09/09/2002), or try a newer BIOS than 3A71 (01/20/2003)\n");