diff --git a/src/ssl_sock.c b/src/ssl_sock.c
index 4d2fcc3..460eb60 100644
--- a/src/ssl_sock.c
+++ b/src/ssl_sock.c
@@ -7593,6 +7593,8 @@
 		static struct ist double_lf = IST("\n\n");
 
 		write = BIO_read(bio, trash->area, trash->size - 1);
+		if (write <= 0)
+			goto end;
 		trash->data = write;
 
 		/* Look for empty lines in the 'trash' buffer and add a space to