2 files changed, 2 insertions, 2 deletions

diff --git a/cstring/include/cstring.h b/cstring/include/cstring.h
index 3e693e1..c24cd35 100644
--- a/cstring/include/cstring.h
+++ b/cstring/include/cstring.h
@@ -75,7 +75,7 @@ static inline void cstring_copy(char* dst, const char* src, size_t count) {
   static inline void STRING##_append_cstr_len(                                \
       STRING* a, const char* b, const size_t b_length) {                      \
     ASSERT(a->length + b_length + 1 <= SIZE);                                 \
-    cstring_copy(a->str + a->length, b, SIZE - a->length);                    \
+    cstring_copy(a->str + a->length, b, b_length);                            \
     a->length += b_length;                                                    \
   }                                                                           \
                                                                               \
diff --git a/cstring/src/cstring.c b/cstring/src/cstring.c
index e308589..100c130 100644
--- a/cstring/src/cstring.c
+++ b/cstring/src/cstring.c
@@ -23,7 +23,7 @@ string string_new(const char* cstr) {
 void string_del(string* str) {
   if (str->data) {
     free((void*)str->data);
-    str->data   = 0;
+    str->data   = nullptr;
     str->length = 0;
   }
 }