1 files changed, 4 insertions, 4 deletions

diff --git a/src/bootstrap/environment.c b/src/bootstrap/environment.c
index e111753..78f31fb 100644
--- a/src/bootstrap/environment.c
+++ b/src/bootstrap/environment.c
@@ -106,15 +106,15 @@ env_extend(Environment *parent, Environment *extra) {
     for (size_t i = 0; i < extra->size; i++) {
         EnvEntry entry = extra->buf[i];
         Environment *tmp = env;
-        ssize_t idx = -1;
+        bool found = false;
         while (tmp != NULL) {
-            idx = env_index_current(tmp, entry.symbol);
-            if (idx != -1) {
+            if (env_index_current(tmp, entry.symbol) != -1) {
+                found = true;
                 break;
             }
             tmp = tmp->parent;
         }
-        if (idx == -1) {
+        if (!found) {
             env_add_symbol(env, obj_duplicate(entry.symbol), obj_duplicate(entry.value));
         }
     }