diff --git a/fuzz/fuzz_targets/fuzz_polkavm.rs b/fuzz/fuzz_targets/fuzz_polkavm.rs
index 8578f53d..87dc5e40 100644
--- a/fuzz/fuzz_targets/fuzz_polkavm.rs
+++ b/fuzz/fuzz_targets/fuzz_polkavm.rs
@@ -274,6 +274,14 @@ enum OperationKind {
         reg1: OperationReg,
         reg2: OperationReg,
     },
+    RegImm64Args {
+        reg: OperationReg,
+        imm: u64,
+    },
+    RegImmOffsetArgs {
+        reg: OperationReg,
+        imm: u32,
+    },
 }
 
 fn transform_code(data: Vec<OperationKind>) -> Vec<Instruction> {
@@ -504,6 +512,8 @@ fn transform_code(data: Vec<OperationKind>) -> Vec<Instruction> {
                     }
                 }
             }
+            OperationKind::RegImm64Args { reg, imm } => asm::load_imm64(reg.into(), imm),
+            OperationKind::RegImmOffsetArgs { reg, imm } => asm::load_imm_and_jump(reg.into(), imm, 0),
         };
 
         buffer.push(op);