diff --git a/plat/arm/board/fvp/fdts/fvp_spmc_optee_sp_manifest.dts b/plat/arm/board/fvp/fdts/fvp_spmc_optee_sp_manifest.dts
index 8a3a5ee58..234ab587e 100644
--- a/plat/arm/board/fvp/fdts/fvp_spmc_optee_sp_manifest.dts
+++ b/plat/arm/board/fvp/fdts/fvp_spmc_optee_sp_manifest.dts
@@ -35,7 +35,7 @@
 			debug_name = "op-tee";
 			load_address = <0x6280000>;
 			vcpu_count = <8>;
-			mem_size = <1048576>;
+			mem_size = <0xd80000>;
 		};
 	};