diff --git a/defaults/main.yml b/defaults/main.yml
index 7d6c17a..928e7c7 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -27,7 +27,7 @@ nginx_worker_rlimit_nofile: 2048
 nginx_server_tokens: 'off'
 
 nginx_default_max_buffers_size: 16
-nginx_client_header_buffer_size: '{{ nginx_default_max_buffers_size / 2 }}k'
+nginx_client_header_buffer_size: '{{ nginx_default_max_buffers_size / 2 | int }}k'
 nginx_client_body_buffer_size: '{{ nginx_default_max_buffers_size }}k'
 nginx_large_client_header_buffers: '4 {{ nginx_default_max_buffers_size }}k'