1 files changed, 5 insertions, 2 deletions
diff --git a/src/buffer.c b/src/buffer.c
index 84fb5fa..972e23a 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -16,10 +16,12 @@ void buffer_deinit(Buffer *self) {
     self->capacity = 0;
 }
 
-static CHECK_RESULT int buffer_ensure_capacity(Buffer *self, usize new_capacity) {
+static CHECK_RESULT int buffer_ensure_capacity_for(Buffer *self, usize size) {
     usize capacity;
     void *new_mem;
     int alloc_result;
+    usize new_capacity;
+    new_capacity = self->size + size;
 
     if(self->capacity >= new_capacity)
         return BUFFER_OK;
@@ -43,8 +45,9 @@ static CHECK_RESULT int buffer_ensure_capacity(Buffer *self, usize new_capacity)
 }
 
 int buffer_append(Buffer *self, void *data, usize size) {
-    return_if_error(buffer_ensure_capacity(self, self->size + size));
+    return_if_error(buffer_ensure_capacity_for(self, size));
     am_memcpy(self->data + self->size, data, size);
+    self->size += size;
     return BUFFER_OK; 
 }