diff --git a/.gitignore b/.gitignore
index 3950f94..b420347 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 # git ignores
 *~
 build
+!build/c64_c_userport.prg
 .vscode/c_cpp_properties.json
 .vscode/settings.json
 .idea/
diff --git a/build/c64_c_userport.prg b/build/c64_c_userport.prg
new file mode 100644
index 0000000..1f075cb
Binary files /dev/null and b/build/c64_c_userport.prg differ