diff --git a/contrib/examples/httpd/genfiles_example/genfiles_example.c b/contrib/examples/httpd/genfiles_example/genfiles_example.c
index 95e5bdb7..b96df2a7 100644
--- a/contrib/examples/httpd/genfiles_example/genfiles_example.c
+++ b/contrib/examples/httpd/genfiles_example/genfiles_example.c
@@ -57,6 +57,9 @@
 #if !LWIP_HTTPD_CUSTOM_FILES
 #error This needs LWIP_HTTPD_CUSTOM_FILES
 #endif
+#if !LWIP_HTTPD_FILE_EXTENSION
+#error This needs LWIP_HTTPD_FILE_EXTENSION
+#endif
 #if !LWIP_HTTPD_DYNAMIC_HEADERS
 #error This needs LWIP_HTTPD_DYNAMIC_HEADERS
 #endif
diff --git a/src/apps/http/fs.c b/src/apps/http/fs.c
index 27094399..3c9f24d5 100644
--- a/src/apps/http/fs.c
+++ b/src/apps/http/fs.c
@@ -74,7 +74,6 @@ fs_open(struct fs_file *file, const char *name)
       file->data = (const char *)f->data;
       file->len = f->len;
       file->index = f->len;
-      file->pextension = NULL;
       file->flags = f->flags;
 #if HTTPD_PRECALCULATED_CHECKSUM
       file->chksum_count = f->chksum_count;