diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 69bce0c..ff9b8b4 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -49,7 +49,7 @@ jobs:
           key: ${{ matrix.name }}-${{ matrix.cross-target }}
 
       - uses: actions/cache@v4
-        if: "!startsWith(matrix.os, 'windows')"
+        if: startsWith(matrix.os, 'windows') != true
         with:
           path: |
             ~/nih-plug/.cargo/registry/index/
diff --git a/rat/src/shared/float_ext.rs b/rat/src/shared/float_ext.rs
index e81596d..a9f99cf 100644
--- a/rat/src/shared/float_ext.rs
+++ b/rat/src/shared/float_ext.rs
@@ -33,7 +33,7 @@ impl FloatExt for f32 {
   }
 
   fn mix(self, right: f32, factor: f32) -> Self {
-    self * (1. - factor) + right * factor
+    self + (right - self) * factor
   }
 
   /// This is an atan approximation