diff --git a/libibumad/umad.h b/libibumad/umad.h
index e56a1321d..fe170cb62 100644
--- a/libibumad/umad.h
+++ b/libibumad/umad.h
@@ -62,7 +62,7 @@ union umad_gid {
 	} global;
 } __attribute__((aligned(4))) __attribute__((packed));
 
-#define UMAD_MAX_DEVICES 128
+#define UMAD_MAX_DEVICES 256
 #define UMAD_ANY_PORT	0
 typedef struct ib_mad_addr {
 	__be32 qpn;