diff --git a/hbvm/src/vmrun.rs b/hbvm/src/vmrun.rs
index 8062612..2edc880 100644
--- a/hbvm/src/vmrun.rs
+++ b/hbvm/src/vmrun.rs
@@ -132,10 +132,10 @@ where
                     ADDI16 => self.binary_op_imm(u16::wrapping_add),
                     ADDI32 => self.binary_op_imm(u32::wrapping_add),
                     ADDI64 => self.binary_op_imm(u64::wrapping_add),
-                    MULI8 => self.binary_op_imm(u8::wrapping_sub),
-                    MULI16 => self.binary_op_imm(u16::wrapping_sub),
-                    MULI32 => self.binary_op_imm(u32::wrapping_sub),
-                    MULI64 => self.binary_op_imm(u64::wrapping_sub),
+                    MULI8 => self.binary_op_imm(u8::wrapping_mul),
+                    MULI16 => self.binary_op_imm(u16::wrapping_mul),
+                    MULI32 => self.binary_op_imm(u32::wrapping_mul),
+                    MULI64 => self.binary_op_imm(u64::wrapping_mul),
                     ANDI => self.binary_op_imm::<u64>(ops::BitAnd::bitand),
                     ORI => self.binary_op_imm::<u64>(ops::BitOr::bitor),
                     XORI => self.binary_op_imm::<u64>(ops::BitXor::bitxor),