diff --git a/src/speccpu/x264.py b/src/speccpu/x264.py
index 21dc6b2..7c725d6 100644
--- a/src/speccpu/x264.py
+++ b/src/speccpu/x264.py
@@ -48,6 +48,23 @@ class MCBuilder:
 
         return self
 
+    def with_disabled_iscale_mul(self):
+        """
+        Disable the i_scale multiplication in the mc_weight function.
+        Find: "src[x] * weight->i_scale", replace it to src[x]
+
+        >>> builder = MCBuilder()
+        >>> 'src[x] * weight->i_scale' in builder.mc_src
+        True
+        >>> builder = builder.with_disabled_iscale_mul()
+        >>> 'src[x] * weight->i_scale' in builder.mc_src
+        False
+        >>> 'src[x]' in builder.mc_src
+        True
+        """
+        self.mc_src = self.mc_src.replace("src[x] * weight->i_scale", "src[x]")
+        return self
+
     def build(self):
         return self.mc_src