diff --git a/config b/config
index 044deb974e..bf194ebb3c 100644
--- a/config
+++ b/config
@@ -400,6 +400,7 @@ HTTP_LUA_DEPS=" \
             $ngx_addon_dir/src/ngx_http_lua_shdict.h \
             $ngx_addon_dir/src/ngx_http_lua_socket_tcp.h \
             $ngx_addon_dir/src/api/ngx_http_lua_api.h \
+            $ngx_addon_dir/src/api/ngx_http_lua_api_common.h \
             $ngx_addon_dir/src/ngx_http_lua_logby.h \
             $ngx_addon_dir/src/ngx_http_lua_sleep.h \
             $ngx_addon_dir/src/ngx_http_lua_semaphore.h\
diff --git a/src/api/ngx_http_lua_api.h b/src/api/ngx_http_lua_api.h
index a725a51413..231b5757aa 100644
--- a/src/api/ngx_http_lua_api.h
+++ b/src/api/ngx_http_lua_api.h
@@ -15,6 +15,7 @@
 #include <lua.h>
 #include <stdint.h>
 
+#include "ngx_http_lua_api_common.h"
 
 /* Public API for other Nginx modules */
 
diff --git a/src/api/ngx_http_lua_api_common.h b/src/api/ngx_http_lua_api_common.h
new file mode 100644
index 0000000000..9d80fb128b
--- /dev/null
+++ b/src/api/ngx_http_lua_api_common.h
@@ -0,0 +1,19 @@
+
+#ifndef _NGX_HTTP_LUA_API_COMMON_H_INCLUDED_
+#define _NGX_HTTP_LUA_API_COMMON_H_INCLUDED_
+
+#include <ngx_core.h>
+
+
+#ifndef NGX_LUA_NO_FFI_API
+typedef struct {
+    int          len;
+    /* this padding hole on 64-bit systems is expected */
+    u_char      *data;
+} ngx_http_lua_ffi_str_t;
+#endif /* NGX_LUA_NO_FFI_API */
+
+
+#endif /* _NGX_HTTP_LUA_API_COMMON_H_INCLUDED_ */
+
+/* vi:set ft=c ts=4 sw=4 et fdm=marker: */
diff --git a/src/ngx_http_lua_common.h b/src/ngx_http_lua_common.h
index 01ef2bec8b..be06e8fbb4 100644
--- a/src/ngx_http_lua_common.h
+++ b/src/ngx_http_lua_common.h
@@ -21,6 +21,8 @@
 #include <lualib.h>
 #include <lauxlib.h>
 
+#include "api/ngx_http_lua_api_common.h"
+
 
 #if (NGX_PCRE)
 
diff --git a/src/ngx_http_lua_util.h b/src/ngx_http_lua_util.h
index e9924e41eb..57957f6c55 100644
--- a/src/ngx_http_lua_util.h
+++ b/src/ngx_http_lua_util.h
@@ -18,13 +18,6 @@
 
 
 #ifndef NGX_LUA_NO_FFI_API
-typedef struct {
-    int          len;
-    /* this padding hole on 64-bit systems is expected */
-    u_char      *data;
-} ngx_http_lua_ffi_str_t;
-
-
 typedef struct {
     ngx_http_lua_ffi_str_t   key;
     ngx_http_lua_ffi_str_t   value;