diff --git a/src/process.cc b/src/process.cc
index 9f43513..a1226c2 100644
--- a/src/process.cc
+++ b/src/process.cc
@@ -570,7 +570,7 @@ OSTD_EXPORT void subprocess::open_impl(
         )) {
             throw process_error{"unicode conversion failed"};
         }
-        if (use_path) {
+        if (!use_path) {
             cmdpath = wcmd.get();
         } else {
             cmdpath = resolve_file(wcmd.get());