diff --git a/apps/s_client.c b/apps/s_client.c
index 1fa157573..81617afb2 100644
--- a/apps/s_client.c
+++ b/apps/s_client.c
@@ -60,7 +60,7 @@
    recursive header file inclusion, resulting in the compiler complaining
    that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
    is needed to have fileno() declared correctly...  So let's define u_int */
-#if defined(__DECC) && !defined(__U_INT)
+#if defined(VMS) && defined(__DECC) && !defined(__U_INT)
 #define __U_INT
 typedef unsigned int u_int;
 #endif
diff --git a/apps/s_server.c b/apps/s_server.c
index 234194951..0a25d8cb0 100644
--- a/apps/s_server.c
+++ b/apps/s_server.c
@@ -60,7 +60,7 @@
    recursive header file inclusion, resulting in the compiler complaining
    that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
    is needed to have fileno() declared correctly...  So let's define u_int */
-#if defined(__DECC) && !defined(__U_INT)
+#if defined(VMS) && defined(__DECC) && !defined(__U_INT)
 #define __U_INT
 typedef unsigned int u_int;
 #endif
diff --git a/apps/s_socket.c b/apps/s_socket.c
index 99a94633a..6302f9f93 100644
--- a/apps/s_socket.c
+++ b/apps/s_socket.c
@@ -60,7 +60,7 @@
    recursive header file inclusion, resulting in the compiler complaining
    that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
    is needed to have fileno() declared correctly...  So let's define u_int */
-#if defined(__DECC) && !defined(__U_INT)
+#if defined(VMS) && defined(__DECC) && !defined(__U_INT)
 #define __U_INT
 typedef unsigned int u_int;
 #endif