diff --git a/configure b/configure
index 25089c31e18b84fc5d0dd502c6df64ea56e04ba9..14c9dd2ff7d022bce319695f26a4fc1665f60fc4 100755
--- a/configure
+++ b/configure
@@ -8345,6 +8345,7 @@ if test "x$ac_cv_cflags__Wl___disable_stdcall_fixup" = xyes; then :
 fi ;;
     esac
         enable_iphlpapi=${enable_iphlpapi:-no}
+    enable_nsiproxy_sys=${enable_nsiproxy_sys:-no}
     enable_ws2_32=${enable_ws2_32:-no}
     enable_loader=${enable_loader:-no}
     enable_server=${enable_server:-no}
diff --git a/configure.ac b/configure.ac
index 5c4f0c8a6cba8ed92321beb632d12bbc87874569..09c58aaff2898a547c52628015548e0c39b7f6d3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -735,6 +735,7 @@ case $host_os in
     esac
     dnl Disable modules that can't be used on Windows
     enable_iphlpapi=${enable_iphlpapi:-no}
+    enable_nsiproxy_sys=${enable_nsiproxy_sys:-no}
     enable_ws2_32=${enable_ws2_32:-no}
     enable_loader=${enable_loader:-no}
     enable_server=${enable_server:-no}