diff -r 5f931e3e7a63 -r 511a9946f83e src/java.base/unix/native/libnio/ch/nio_util.h
--- a/src/java.base/unix/native/libnio/ch/nio_util.h	Fri Sep 21 18:57:18 2018 +0200
+++ b/src/java.base/unix/native/libnio/ch/nio_util.h	Wed Sep 26 14:28:37 2018 +0200
@@ -40,7 +40,7 @@
 #ifndef SO_REUSEPORT
 #ifdef __linux__
 #define SO_REUSEPORT 15
-#elif __solaris__
+#elif defined(__solaris__)
 #define SO_REUSEPORT 0x100e
 #elif defined(AIX) || defined(MACOSX)
 #define SO_REUSEPORT 0x0200