diff -urpN jumbo-bleed1/src/detect.c jumbo-bleed0/src/detect.c
--- jumbo-bleed1/src/detect.c	2012-07-07 15:30:03.968750000 +0000
+++ jumbo-bleed0/src/detect.c	2012-07-07 16:03:11.875000000 +0000
@@ -44,7 +44,18 @@ int main(int argc, char **argv)
 "#define ARCH_BITS_STR\t\t\t\"%d\"\n"
 "#define ARCH_LITTLE_ENDIAN\t\t%d\n"
 "#define ARCH_INT_GT_32\t\t\t%d\n"
+#if defined(i386) || defined(__i386__) || defined(__i486__) || \
+	defined(__i586__) || defined(__i686__) || defined(__pentium__) || \
+	defined(__pentiumpro__) || defined(__pentium4__) || \
+	defined(__nocona__) || defined(prescott) || defined(__core2__) || \
+	defined(__k6__) || defined(__k8__) || defined(__athlon__) || \
+	defined(__amd64) || defined(__amd64__) || \
+	defined(__x86_64) || defined(__x86_64__) || defined(_M_IX86) || \
+	defined(_M_AMD64) || defined(_M_IA64) || defined(_M_X64)
+"#define ARCH_ALLOWS_UNALIGNED\t\t1\n"
+#else
 "#define ARCH_ALLOWS_UNALIGNED\t\t0\n"
+#endif
 #ifdef __alpha__
 "#define ARCH_INDEX(x)\t\t\t((unsigned long)(unsigned char)(x))\n"
 #else