diff --git a/configure b/configure
index 695ed1f0a..4c8e8f278 100755
--- a/configure
+++ b/configure
@@ -5649,6 +5649,7 @@ then
     if test "$target_win64" = yes
     then
             target_cpu=x86_64
+      YAP_TARGET=amd64
 
 { echo "$as_me:$LINENO: checking for main in -lws2_32" >&5
 echo $ECHO_N "checking for main in -lws2_32... $ECHO_C" >&6; }
diff --git a/configure.in b/configure.in
index 218452920..8a74b7368 100755
--- a/configure.in
+++ b/configure.in
@@ -672,6 +672,7 @@ then
     then
       dnl configure messes up badly on this.
       target_cpu=x86_64
+      YAP_TARGET=amd64
       AC_CHECK_LIB(ws2_32,main)
       EXTRA_LIBS_FOR_DLLS="-lws2_32"
     elif test "$target_os" = "cygwin"