diff --git a/CMakeLists.txt b/CMakeLists.txt
index bbb809c7..35a480be 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -768,7 +768,7 @@ endif()
 #
 set(CPACK_PACKAGE_NAME "GmSSL")
 set(CPACK_PACKAGE_VENDOR "GmSSL develop team")
-set(CPACK_PACKAGE_VERSION "3.2.0-dev.1016")
+set(CPACK_PACKAGE_VERSION "3.2.0-dev.1017")
 set(CPACK_PACKAGE_DESCRIPTION_FILE ${PROJECT_SOURCE_DIR}/README.md)
 set(CPACK_NSIS_MODIFY_PATH ON)
 include(CPack)
diff --git a/include/gmssl/version.h b/include/gmssl/version.h
index d3705b68..ef1d88b4 100644
--- a/include/gmssl/version.h
+++ b/include/gmssl/version.h
@@ -19,7 +19,7 @@ extern "C" {
 
 // Also update CPACK_PACKAGE_VERSION in CMakeLists.txt
 #define GMSSL_VERSION_NUM	30200
-#define GMSSL_VERSION_STR	"GmSSL 3.2.0-dev.1016"
+#define GMSSL_VERSION_STR	"GmSSL 3.2.0-dev.1017"
 
 int gmssl_version_num(void);
 const char *gmssl_version_str(void);
diff --git a/src/tls.c b/src/tls.c
index 06633612..ca8758bc 100644
--- a/src/tls.c
+++ b/src/tls.c
@@ -3143,25 +3143,13 @@ int tls_set_verbose(TLS_CONNECT *conn, int verbose)
 
 int tls_set_socket(TLS_CONNECT *conn, tls_socket_t sock)
 {
-#ifdef WIN32
-	u_long flags = 0; // TODO: 0 == blocking, 1 == non-blocking
-    	if(ioctlsocket(sock, FIONBIO, &flags) != 0)   {
-		error_puts("socket in non-blocking mode");
-		//nginx will pass a socket in non-blocking mode
-		//return -1; // FIXME
-	}
-#else
+#ifndef WIN32
 	int flags = 0;
 	if ((flags = fcntl(sock, F_GETFL)) == -1) {
 		error_print();
 		perror("fcntl error");
 		return -1;
 	}
-	if (flags & O_NONBLOCK) {
-		error_puts("socket in non-blocking mode");
-		//nginx will pass a socket in non-blocking mode
-		//return -1; // FIXME
-	}
 #endif
 	conn->sock = sock;
 	return 1;