diff --git a/doc/doxygen/lwip.Doxyfile b/doc/doxygen/lwip.Doxyfile
index 60449efe..dd5f828c 100644
--- a/doc/doxygen/lwip.Doxyfile
+++ b/doc/doxygen/lwip.Doxyfile
@@ -2081,6 +2081,7 @@ PREDEFINED             = __DOXYGEN__=1 \
                          LWIP_IGMP=1 \
                          LWIP_TCP=1 \
                          LWIP_SNMP=1 \
+                         SNMP_USE_NETCONN=1 \
                          SNMP_USE_RAW=1 \
                          MEMP_OVERFLOW_CHECK=0 \
                          MEMP_SANITY_CHECK=1 \
diff --git a/doc/doxygen/main_page.h b/doc/doxygen/main_page.h
index e7e91534..9f01d9f3 100644
--- a/doc/doxygen/main_page.h
+++ b/doc/doxygen/main_page.h
@@ -1,8 +1,5 @@
 /**
  * @defgroup lwip lwIP
- * 
- * @defgroup lwip_opts Options (lwipopts.h)
- * @ingroup lwip
  *
  * @defgroup infrastructure Infrastructure
  *
diff --git a/src/include/lwip/opt.h b/src/include/lwip/opt.h
index 7069632d..86c7520a 100644
--- a/src/include/lwip/opt.h
+++ b/src/include/lwip/opt.h
@@ -51,7 +51,12 @@
 #include "lwipopts.h"
 #include "lwip/debug.h"
 
-/*
+/** 
+ * @defgroup lwip_opts Options (lwipopts.h)
+ * @ingroup lwip
+ */
+
+ /*
    ------------------------------------
    -------------- NO SYS --------------
    ------------------------------------
@@ -108,7 +113,7 @@
  */
 
 /**
- * @defgroup lwip_opts_memcpy memcpy at al.
+ * @defgroup lwip_opts_memcpy memcpy
  * @ingroup lwip_opts
  * @{
  */