diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 13db8c0..62bad6d 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -6932,6 +6932,11 @@
     for (i = 0; id[i] && str[i]; i++)
         if (id[i] != str[i])
             return ((int)id[i] < (int)str[i]) ? -1 : 1;
+    /* This check keeps Python strings that end in '\0' from comparing equal
+     to C strings identical up to that point. */
+    if (PyUnicode_GET_SIZE(uni) != i)
+        /* We'll say the Python string is longer. */
+        return 1;
     if (id[i])
         return 1; /* uni is longer */
     if (str[i])