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-rw-r--r--net/ipv4/tcp_illinois.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv4/tcp_illinois.c b/net/ipv4/tcp_illinois.c
index 8a520996f3d2..f43947235b35 100644
--- a/net/ipv4/tcp_illinois.c
+++ b/net/ipv4/tcp_illinois.c
@@ -23,7 +23,9 @@
#define ALPHA_MIN ((3*ALPHA_SCALE)/10) /* ~0.3 */
#define ALPHA_MAX (10*ALPHA_SCALE) /* 10.0 */
#define ALPHA_BASE ALPHA_SCALE /* 1.0 */
+#ifndef U32_MAX
#define U32_MAX ((u32)~0U)
+#endif /* !U32_MAX */
#define RTT_MAX (U32_MAX / ALPHA_MAX) /* 3.3 secs */
#define BETA_SHIFT 6