diff --git a/NEWS b/NEWS
index 44d7b87e6ca..c54c42628e2 100644
--- a/NEWS
+++ b/NEWS
@@ -45,6 +45,9 @@ PHP                                                                        NEWS
     properties in traits). (nielsdos)
   . Fix leak of accel_globals->key. (nielsdos)
 
+- OpenSSL:
+  . Fix missing checks against php_set_blocking() in xp_ssl.c. (nielsdos)
+
 - SPL:
   . Fixed bug GH-18421 (Integer overflow with large numbers in LimitIterator).
     (nielsdos)
diff --git a/ext/openssl/xp_ssl.c b/ext/openssl/xp_ssl.c
index eb7ab93815a..d4f162b7b4f 100644
--- a/ext/openssl/xp_ssl.c
+++ b/ext/openssl/xp_ssl.c
@@ -1897,6 +1897,15 @@ static int php_openssl_capture_peer_certs(php_stream *stream,
 }
 /* }}} */
 
+static zend_result php_openssl_set_blocking(php_openssl_netstream_data_t *sslsock, int block)
+{
+	zend_result result = php_set_sock_blocking(sslsock->s.socket, block);
+	if (EXPECTED(SUCCESS == result)) {
+		sslsock->s.is_blocked = block;
+	}
+	return result;
+}
+
 static int php_openssl_enable_crypto(php_stream *stream,
 		php_openssl_netstream_data_t *sslsock,
 		php_stream_xport_crypto_param *cparam) /* {{{ */
@@ -1925,8 +1934,7 @@ static int php_openssl_enable_crypto(php_stream *stream,
 			sslsock->state_set = 1;
 		}
 
-		if (SUCCESS == php_set_sock_blocking(sslsock->s.socket, 0)) {
-			sslsock->s.is_blocked = 0;
+		if (SUCCESS == php_openssl_set_blocking(sslsock, 0)) {
 			/* The following mode are added only if we are able to change socket
 			 * to non blocking mode which is also used for read and write */
 			SSL_set_mode(sslsock->ssl_handle, SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
@@ -1979,8 +1987,8 @@ static int php_openssl_enable_crypto(php_stream *stream,
 			}
 		} while (retry);
 
-		if (sslsock->s.is_blocked != blocked && SUCCESS == php_set_sock_blocking(sslsock->s.socket, blocked)) {
-			sslsock->s.is_blocked = blocked;
+		if (sslsock->s.is_blocked != blocked) {
+			php_openssl_set_blocking(sslsock, blocked);
 		}
 
 		if (n == 1) {
@@ -2063,8 +2071,8 @@ static ssize_t php_openssl_sockop_io(int read, php_stream *stream, char *buf, si
 			timeout = &sslsock->s.timeout;
 		}
 
-		if (timeout && php_set_sock_blocking(sslsock->s.socket, 0) == SUCCESS) {
-			sslsock->s.is_blocked = 0;
+		if (timeout) {
+			php_openssl_set_blocking(sslsock, 0);
 		}
 
 		if (!sslsock->s.is_blocked && timeout && (timeout->tv_sec > 0 || (timeout->tv_sec == 0 && timeout->tv_usec))) {
@@ -2088,8 +2096,7 @@ static ssize_t php_openssl_sockop_io(int read, php_stream *stream, char *buf, si
 				if (php_openssl_compare_timeval(elapsed_time, *timeout) > 0 ) {
 					/* If the socket was originally blocking, set it back. */
 					if (began_blocked) {
-						php_set_sock_blocking(sslsock->s.socket, 1);
-						sslsock->s.is_blocked = 1;
+						php_openssl_set_blocking(sslsock, 1);
 					}
 					sslsock->s.timeout_event = 1;
 					return -1;
@@ -2184,8 +2191,8 @@ static ssize_t php_openssl_sockop_io(int read, php_stream *stream, char *buf, si
 		}
 
 		/* And if we were originally supposed to be blocking, let's reset the socket to that. */
-		if (began_blocked && php_set_sock_blocking(sslsock->s.socket, 1) == SUCCESS) {
-			sslsock->s.is_blocked = 1;
+		if (began_blocked) {
+			php_openssl_set_blocking(sslsock, 1);
 		}
 
 		return 0 > nr_bytes ? 0 : nr_bytes;
@@ -2491,8 +2498,8 @@ static int php_openssl_sockop_set_option(php_stream *stream, int option, int val
 							timeout = &tv;
 						}
 
-						if (timeout && php_set_sock_blocking(sslsock->s.socket, 0) == SUCCESS) {
-							sslsock->s.is_blocked = 0;
+						if (timeout) {
+							php_openssl_set_blocking(sslsock, 0);
 						}
 
 						if (!sslsock->s.is_blocked && timeout && (timeout->tv_sec > 0 || (timeout->tv_sec == 0 && timeout->tv_usec))) {
@@ -2516,8 +2523,7 @@ static int php_openssl_sockop_set_option(php_stream *stream, int option, int val
 								if (php_openssl_compare_timeval(elapsed_time, *timeout) > 0 ) {
 									/* If the socket was originally blocking, set it back. */
 									if (began_blocked) {
-										php_set_sock_blocking(sslsock->s.socket, 1);
-										sslsock->s.is_blocked = 1;
+										php_openssl_set_blocking(sslsock, 1);
 									}
 									sslsock->s.timeout_event = 1;
 									return PHP_STREAM_OPTION_RETURN_ERR;
@@ -2568,8 +2574,7 @@ static int php_openssl_sockop_set_option(php_stream *stream, int option, int val
 
 						if (began_blocked && !sslsock->s.is_blocked) {
 							// Set it back to blocking
-							php_set_sock_blocking(sslsock->s.socket, 1);
-							sslsock->s.is_blocked = 1;
+							php_openssl_set_blocking(sslsock, 1);
 						}
 					} else {
 #ifdef PHP_WIN32