diff --git a/ubuntu-win64-cross/Dockerfile b/ubuntu-win64-cross/Dockerfile
index 5d31d74f14..ba71d05386 100644
--- a/ubuntu-win64-cross/Dockerfile
+++ b/ubuntu-win64-cross/Dockerfile
@@ -62,7 +62,8 @@ RUN cd /opt \
             pixman \
             libsamplerate \
             openssl \
-            cmake
+            cmake \
+            libslirp
 
 RUN rm /opt/mxe/src/sdl2*.patch
 COPY sdl2.mk /opt/mxe/src/sdl2.mk