diff --git a/src/env.c b/src/env.c
index 8d048d1..de97f6e 100644
--- a/src/env.c
+++ b/src/env.c
@@ -38,6 +38,7 @@ Object fetchFromEnvironment(const char *name, struct Environment *env)
         return fetchFromEnvironment(name, env->outer);
     }
 
+    printf("'%s'\n", name);
     return errorObject(DID_NOT_FIND_SYMBOL);
 }