diff --git a/src/os/linux/vm/os_linux.cpp b/src/os/linux/vm/os_linux.cpp
index 8700d10bee06d7d0a1137f1f45282aafb533f3db..330e347a7e5fb0f4ea9d752e362879c7f4512dd4 100644
--- a/src/os/linux/vm/os_linux.cpp
+++ b/src/os/linux/vm/os_linux.cpp
@@ -115,6 +115,7 @@
 # include <link.h>
 # include <stdint.h>
 # include <inttypes.h>
+# include <sys/ioctl.h>
 
 #define MAX_PATH    (2 * K)
 
@@ -4433,6 +4434,15 @@ int os::available(int fd, jlong *bytes) {
   return 1;
 }
 
+int os::socket_available(int fd, jint *pbytes) {
+  // Linux doc says EINTR not returned, unlike Solaris
+  int ret = ::ioctl(fd, FIONREAD, pbytes);
+
+  //%% note ioctl can return 0 when successful, JVM_SocketAvailable
+  // is expected to return 0 on failure and 1 on success to the jdk.
+  return (ret < 0) ? 0 : 1;
+}
+
 // Map a block of memory.
 char* os::map_memory(int fd, const char* file_name, size_t file_offset,
                      char *addr, size_t bytes, bool read_only,
diff --git a/src/os/linux/vm/os_linux.inline.hpp b/src/os/linux/vm/os_linux.inline.hpp
index 6e52d108fb82ea5296fb18d96d67f15a58d441b5..9af7e789764c8fa603be547f38e78f973b828c26 100644
--- a/src/os/linux/vm/os_linux.inline.hpp
+++ b/src/os/linux/vm/os_linux.inline.hpp
@@ -45,7 +45,6 @@
 #include <unistd.h>
 #include <sys/socket.h>
 #include <sys/poll.h>
-#include <sys/ioctl.h>
 #include <netdb.h>
 
 inline void* os::thread_local_storage_at(int index) {
@@ -268,16 +267,6 @@ inline int os::sendto(int fd, char *buf, int len, int flags,
   RESTARTABLE_RETURN_INT(::sendto(fd, buf, len, (unsigned int) flags, to, tolen));
 }
 
-inline int os::socket_available(int fd, jint *pbytes) {
-  // Linux doc says EINTR not returned, unlike Solaris
-  int ret = ::ioctl(fd, FIONREAD, pbytes);
-
-  //%% note ioctl can return 0 when successful, JVM_SocketAvailable
-  // is expected to return 0 on failure and 1 on success to the jdk.
-  return (ret < 0) ? 0 : 1;
-}
-
-
 inline int os::socket_shutdown(int fd, int howto){
   return ::shutdown(fd, howto);
 }