diff --git a/auto/sources b/auto/sources
index 9c7311e..ed78c71 100644
--- a/auto/sources
+++ b/auto/sources
@@ -460,3 +460,7 @@
 
 MAIL_PROXY_MODULE="ngx_mail_proxy_module"
 MAIL_PROXY_SRCS="src/mail/ngx_mail_proxy_module.c"
+
+NGX_GOOGLE_PERFTOOLS_MODULE=ngx_google_perftools_module
+NGX_GOOGLE_PERFTOOLS_SRCS=src/misc/ngx_google_perftools_module.c
+