diff --git a/configure.ac b/configure.ac
index 72d67e52..d6906edc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -211,6 +211,7 @@ case $host in
      AC_CHECK_LIB([shlwapi],      [main],, AC_MSG_ERROR(lib missing))
      AC_CHECK_LIB([iphlpapi],      [main],, AC_MSG_ERROR(lib missing))
      AC_CHECK_LIB([crypt32],      [main],, AC_MSG_ERROR(lib missing))
+     AC_CHECK_LIB([mman],      [main],, AC_MSG_ERROR(lib missing))
 
      # -static is interpreted by libtool, where it has a different meaning.
      # In libtool-speak, it's -all-static.