diff --git a/src/include/os/solaris/osiSock.h b/src/include/os/solaris/osiSock.h
index 6ae519ee3..431031746 100644
--- a/src/include/os/solaris/osiSock.h
+++ b/src/include/os/solaris/osiSock.h
@@ -22,6 +22,7 @@ extern "C" {
 #include <netinet/in.h>
 #include <netinet/tcp.h>
 #include <arpa/inet.h>
+#include <net/if.h>
 #include <netdb.h>
 #include <unistd.h> /* close() and others */
  
diff --git a/src/libCom/osi/os/solaris/osdSock.h b/src/libCom/osi/os/solaris/osdSock.h
index 6ae519ee3..431031746 100644
--- a/src/libCom/osi/os/solaris/osdSock.h
+++ b/src/libCom/osi/os/solaris/osdSock.h
@@ -22,6 +22,7 @@ extern "C" {
 #include <netinet/in.h>
 #include <netinet/tcp.h>
 #include <arpa/inet.h>
+#include <net/if.h>
 #include <netdb.h>
 #include <unistd.h> /* close() and others */