diff --git a/usr/src/uts/common/io/mlxcx/mlxcx_reg.h b/usr/src/uts/common/io/mlxcx/mlxcx_reg.h
index 908a426dedc9..f202876ca513 100644
--- a/usr/src/uts/common/io/mlxcx/mlxcx_reg.h
+++ b/usr/src/uts/common/io/mlxcx/mlxcx_reg.h
@@ -2387,12 +2387,13 @@ typedef struct {
 	uint8_t mlrd_pcam_feature_group;
 	uint8_t mlrd_pcam_reserved2;
 	uint8_t mlrd_pcam_access_reg_group;
+	uint32_t mlrd_pcam_reserved3;
 	uint64_t mlrd_pcam_port_access_reg_cap_mask_high; /* Bits 127 -> 64  */
 	uint64_t mlrd_pcam_port_access_reg_cap_mask_low;  /* Bits 63 -> 0 */
-	uint64_t mlrd_pcam_reserved3[2];
+	uint64_t mlrd_pcam_reserved4[2];
 	uint64_t mlrd_pcam_feature_cap_mask_high; /* Bits 127 -> 64  */
 	uint64_t mlrd_pcam_feature_cap_mask_low;  /* Bits 63 -> 0 */
-	uint64_t mlrd_pcam_reserved4[2];
+	uint64_t mlrd_pcam_reserved5[2];
 } mlxcx_reg_pcam_t;
 
 /* PTYS - Port TYpe and Speed register. */