diff --git a/kernel/busses/i2c-piix4.c b/kernel/busses/i2c-piix4.c
index 698353d9..659c7766 100644
--- a/kernel/busses/i2c-piix4.c
+++ b/kernel/busses/i2c-piix4.c
@@ -186,12 +186,12 @@ static unsigned short piix4_smba = 0;
 /*
  * Get DMI information.
  */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,99)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,34)
 void dmi_scan_machine(void);
 #endif
 static int __init ibm_dmi_probe(void)
 {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,99)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,34)
 	extern int is_unsafe_smbus;
 	return is_unsafe_smbus;
 #else