diff --git a/reproc++/include/reproc++/reproc.hpp b/reproc++/include/reproc++/reproc.hpp
index ab6f139..d4b370f 100644
--- a/reproc++/include/reproc++/reproc.hpp
+++ b/reproc++/include/reproc++/reproc.hpp
@@ -88,18 +88,18 @@ struct redirect {
 
 struct options {
   struct {
-    env::type behavior;
+    reproc::env::type behavior;
     /*! Implicitly converts from any STL container of string pairs to the
     environment format expected by `reproc_start`. */
-    class env extra;
+    reproc::env extra;
   } env = {};
 
   const char *working_directory = nullptr;
 
   struct {
-    redirect in;
-    redirect out;
-    redirect err;
+    struct redirect in;
+    struct redirect out;
+    struct redirect err;
     bool parent;
     bool discard;
     FILE *file;