diff --git a/uwsgi.c b/uwsgi.c
index dfcd5ae2..ac943564 100644
--- a/uwsgi.c
+++ b/uwsgi.c
@@ -1370,7 +1370,7 @@ int uwsgi_start(void *v_argv) {
 				}
 			}
 			else {
-				if (cst.st_size != uwsgi.cache_filesize || !S_ISREG(cst.st_mode)) {
+				if ((size_t)cst.st_size != uwsgi.cache_filesize || !S_ISREG(cst.st_mode)) {
 					uwsgi_log("invalid cache store file. Please remove it or fix cache blocksize/items to match its size\n");
 					exit(1);
 				}
diff --git a/uwsgi.h b/uwsgi.h
index b0163f75..159e9f8a 100644
--- a/uwsgi.h
+++ b/uwsgi.h
@@ -66,9 +66,6 @@
 #include <stdlib.h>
 #include <signal.h>
 #include <netinet/in.h>
-#ifdef UWSGI_ASYNC
-#include <setjmp.h>
-#endif
 
 #ifdef __sun__
 #define _XPG4_2
@@ -678,7 +675,6 @@ struct wsgi_request {
 	int             async_plagued;
 
 	int		suspended;
-	jmp_buf		async_jmp_buf;
 
 	int            *ovector;
 	size_t          post_cl;
@@ -968,8 +964,6 @@ struct uwsgi_server {
 
 	struct wsgi_request *(*current_wsgi_req) (void);
 
-	jmp_buf async_jmp_buf;
-
 	// usedby suspend/resume loops
 	void (*schedule_to_main) (struct wsgi_request *);
 	void (*schedule_to_req) (void);