diff -Naur openjdk.orig/jdk/src/solaris/native/java/net/PlainDatagramSocketImpl.c openjdk/jdk/src/solaris/native/java/net/PlainDatagramSocketImpl.c
--- openjdk.orig/jdk/src/solaris/native/java/net/PlainDatagramSocketImpl.c	2021-02-06 13:14:23.583116147 +0100
+++ openjdk/jdk/src/solaris/native/java/net/PlainDatagramSocketImpl.c	2021-02-06 13:17:35.415119487 +0100
@@ -35,7 +35,7 @@
 #endif
 #ifdef __linux__
 #include <unistd.h>
-#include <sys/sysctl.h>
+#include <linux/sysctl.h>
 #include <sys/utsname.h>
 #include <netinet/ip.h>
 
diff -Naur openjdk.orig/jdk/src/solaris/native/java/net/PlainSocketImpl.c openjdk/jdk/src/solaris/native/java/net/PlainSocketImpl.c
--- openjdk.orig/jdk/src/solaris/native/java/net/PlainSocketImpl.c	2021-02-06 13:14:23.583116147 +0100
+++ openjdk/jdk/src/solaris/native/java/net/PlainSocketImpl.c	2021-02-06 13:15:12.543116999 +0100
@@ -43,7 +43,7 @@
 #endif
 #ifdef __linux__
 #include <unistd.h>
-#include <sys/sysctl.h>
+#include <linux/sysctl.h>
 #endif
 
 #include "jvm.h"