diff --git a/std/os/child_process.zig b/std/os/child_process.zig
index 7aa85823692825ff14e8fdb9c910f88ea71c9850..37f75483a63fa34431a427ad464e30653740f740 100644
--- a/std/os/child_process.zig
+++ b/std/os/child_process.zig
@@ -610,6 +610,9 @@ pub const ChildProcess = struct {
                 } else {
                     return err;
                 }
+            } else {
+                // Every other error would have been returned earlier.
+                return error.FileNotFound;
             }
         };