diff --git a/src/tokenizer.cpp b/src/tokenizer.cpp
index 6adb7dd8636444c7081dd1c5f54a8ac01b051557..deaa2a6ef40e2d1f3fc243ecfc0de5ad3324476f 100644
--- a/src/tokenizer.cpp
+++ b/src/tokenizer.cpp
@@ -293,7 +293,7 @@ static void end_float_token(Tokenize *t) {
             t->cur_tok->data.num_lit.overflow = true;
             return;
         }
-        assert(str_end == buf_ptr(t->buf) + t->cur_tok->end_pos);
+        assert(str_end <= buf_ptr(t->buf) + t->cur_tok->end_pos);
         return;
     }