diff --git a/lib/plat/esp32/esp32-fds.c b/lib/plat/esp32/esp32-fds.c
index 7551f1f8d..a6fc86c71 100644
--- a/lib/plat/esp32/esp32-fds.c
+++ b/lib/plat/esp32/esp32-fds.c
@@ -44,3 +44,15 @@ lws_plat_change_pollfd(struct lws_context *context,
 {
 	return 0;
 }
+
+int
+insert_wsi(const struct lws_context *context, struct lws *wsi)
+{
+    assert(context->lws_lookup[wsi->desc.sockfd -
+                               lws_plat_socket_offset()] == 0);
+
+    context->lws_lookup[wsi->desc.sockfd - \
+                      lws_plat_socket_offset()] = wsi;
+
+    return 0;
+}
\ No newline at end of file
diff --git a/lib/plat/esp32/private.h b/lib/plat/esp32/private.h
index 7b256e856..fa48c5107 100644
--- a/lib/plat/esp32/private.h
+++ b/lib/plat/esp32/private.h
@@ -90,9 +90,12 @@ gai_strerror(int);
 #define compatible_close(x) close(x)
 #define lws_plat_socket_offset() LWIP_SOCKET_OFFSET
 #define wsi_from_fd(A,B)  A->lws_lookup[B - lws_plat_socket_offset()]
-#define insert_wsi(A,B)   assert(A->lws_lookup[B->desc.sockfd - \
-				  lws_plat_socket_offset()] == 0); \
-				 A->lws_lookup[B->desc.sockfd - \
-				  lws_plat_socket_offset()] = B
+
+struct lws_context;
+struct lws;
+
+int
+insert_wsi(const struct lws_context *context, struct lws *wsi);
+
 #define delete_from_fd(A,B) A->lws_lookup[B - lws_plat_socket_offset()] = 0