--- config.m4.orig	2010-12-01 20:20:16.000000000 +0100
+++ config.m4	2011-02-08 11:40:04.000000000 +0100
@@ -285,6 +285,46 @@
       THIS_PREFIX=$i
       THIS_INCLUDE=$i/db4/db.h
       break
+    elif test -f "$i/include/db51/db.h"; then
+      THIS_PREFIX=$i
+      THIS_INCLUDE=$i/include/db51/db.h
+      break
+    elif test -f "$i/include/db50/db.h"; then
+      THIS_PREFIX=$i
+      THIS_INCLUDE=$i/include/db50/db.h
+      break
+    elif test -f "$i/include/db48/db.h"; then
+      THIS_PREFIX=$i
+      THIS_INCLUDE=$i/include/db48/db.h
+      break
+    elif test -f "$i/include/db47/db.h"; then
+      THIS_PREFIX=$i
+      THIS_INCLUDE=$i/include/db47/db.h
+      break
+    elif test -f "$i/include/db46/db.h"; then
+      THIS_PREFIX=$i
+      THIS_INCLUDE=$i/include/db46/db.h
+      break
+    elif test -f "$i/include/db45/db.h"; then
+      THIS_PREFIX=$i
+      THIS_INCLUDE=$i/include/db45/db.h
+      break
+    elif test -f "$i/include/db44/db.h"; then
+      THIS_PREFIX=$i
+      THIS_INCLUDE=$i/include/db44/db.h
+      break
+    elif test -f "$i/include/db43/db.h"; then
+      THIS_PREFIX=$i
+      THIS_INCLUDE=$i/include/db43/db.h
+      break
+    elif test -f "$i/include/db42/db.h"; then
+      THIS_PREFIX=$i
+      THIS_INCLUDE=$i/include/db42/db.h
+      break
+    elif test -f "$i/include/db41/db.h"; then
+      THIS_PREFIX=$i
+      THIS_INCLUDE=$i/include/db41/db.h
+      break
     elif test -f "$i/include/db5.1/db.h"; then
       THIS_PREFIX=$i
       THIS_INCLUDE=$i/include/db5.1/db.h