diff -up sysprof-1.0.11/module/sysprof-module.c.orig sysprof-1.0.11/module/sysprof-module.c
--- sysprof-1.0.11/module/sysprof-module.c.orig	2008-11-13 10:30:14.000000000 +0100
+++ sysprof-1.0.11/module/sysprof-module.c	2008-11-13 10:56:33.000000000 +0100
@@ -67,25 +67,27 @@ DECLARE_WAIT_QUEUE_HEAD (wait_for_trace)
 DECLARE_WAIT_QUEUE_HEAD (wait_for_exit);
 
 /* Macro the names of the registers that are used on each architecture */
-#if defined(CONFIG_X86_64)
-#       define REG_FRAME_PTR rbp
-#       define REG_INS_PTR rip
-#       define REG_STACK_PTR rsp
-#       define REG_STACK_PTR0 rsp0
-#elif defined(CONFIG_X86)
-#       if LINUX_VERSION_CODE >= KERNEL_VERSION (2,6,25)
-#               define REG_FRAME_PTR bp
-#               define REG_INS_PTR ip
-#               define REG_STACK_PTR sp
-#               define REG_STACK_PTR0 sp0
+#if !defined(CONFIG_X86_64) && !defined(CONFIG_X86)
+#       error Sysprof only supports the i386 and x86-64 architectures
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION (2,6,25)
+#       define REG_FRAME_PTR bp
+#       define REG_INS_PTR ip
+#       define REG_STACK_PTR sp
+#       define REG_STACK_PTR0 sp0
+#else
+#       if defined(CONFIG_X86_64)
+#               define REG_FRAME_PTR rbp
+#               define REG_INS_PTR rip
+#               define REG_STACK_PTR rsp
+#               define REG_STACK_PTR0 rsp0
 #       else
 #               define REG_FRAME_PTR ebp
 #               define REG_INS_PTR eip
 #               define REG_STACK_PTR esp
 #               define REG_STACK_PTR0 esp0
 #       endif
-#else
-#       error Sysprof only supports the i386 and x86-64 architectures
 #endif
 
 typedef struct userspace_reader userspace_reader;