diff --git a/evm/src/cpu/kernel/asm/core/precompiles/blake2_f.asm b/evm/src/cpu/kernel/asm/core/precompiles/blake2_f.asm
index 100bf1de..8e81def8 100644
--- a/evm/src/cpu/kernel/asm/core/precompiles/blake2_f.asm
+++ b/evm/src/cpu/kernel/asm/core/precompiles/blake2_f.asm
@@ -30,7 +30,7 @@ global precompile_blake2_f:
     // stack: flag, flag_addr, blake2_f_contd, kexit_info
     DUP1
     // stack: flag, flag, flag_addr, blake2_f_contd, kexit_info
-    %lt_const(2) ISZERO %jumpi(fault_exception) // Check flag < 2 (flag = 0 or flag = 1)
+    gt_const(1) %jumpi(fault_exception) // Check flag < 2 (flag = 0 or flag = 1)
     // stack: flag, flag_addr, blake2_f_contd, kexit_info
     SWAP1
     // stack: flag_addr, flag, blake2_f_contd, kexit_info