diff --git a/photon/libc/sys/magenta/environ.c b/photon/libc/sys/magenta/environ.c
index 3d5cbc5..f7f1e59 100644
--- a/photon/libc/sys/magenta/environ.c
+++ b/photon/libc/sys/magenta/environ.c
@@ -22,9 +22,9 @@ char *__crt_sys_getenv(const char *name)
             continue;
         }
 
-        char env_name[equal];
-        memcpy(env_name, env, equal - 1);
-        env_name[equal - 1] = '\0';
+        char env_name[equal + 1];
+        memcpy(env_name, env, equal);
+        env_name[equal] = '\0';
 
         if (!strcmp(env_name, name)) {
             return (char *)(env + equal + 1);