diff --git a/src/lib.rs b/src/lib.rs
index 3421a323..dbbe5862 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -7868,6 +7868,10 @@ mod tests {
       ".foo { width: calc(100% - clamp(1.125rem, 1.25vw, 1.2375rem) - clamp(1.125rem, 1.25vw, 1.2375rem)); }",
       ".foo{width:calc(100% - clamp(1.125rem,1.25vw,1.2375rem) - clamp(1.125rem,1.25vw,1.2375rem))}",
     );
+    minify_test(
+      ".foo { width: calc(100% - 2 (2 * var(--card-margin))); }",
+      ".foo{width:calc(100% - 2 (2*var(--card-margin)))}",
+    );
   }
 
   #[test]
diff --git a/src/values/calc.rs b/src/values/calc.rs
index 22610e58..a29ee88d 100644
--- a/src/values/calc.rs
+++ b/src/values/calc.rs
@@ -926,12 +926,14 @@ impl<V: AddInternal + std::convert::Into<Calc<V>> + std::convert::From<Calc<V>>
           Calc::Sum(Box::new(Calc::Number(a)), Box::new(Calc::Sum(b, c)))
         }
       }
-      (a @ Calc::Product(..), b) => Calc::Sum(Box::new(a), Box::new(b)),
-      (a, b @ Calc::Product(..)) => Calc::Sum(Box::new(a), Box::new(b)),
-      (Calc::Value(a), b) => (a.add(V::from(b))).into(),
-      (a, Calc::Value(b)) => (V::from(a).add(*b)).into(),
+      (a @ Calc::Number(_), b)
+      | (a, b @ Calc::Number(_))
+      | (a @ Calc::Product(..), b)
+      | (a, b @ Calc::Product(..)) => Calc::Sum(Box::new(a), Box::new(b)),
       (Calc::Function(a), b) => Calc::Sum(Box::new(Calc::Function(a)), Box::new(b)),
       (a, Calc::Function(b)) => Calc::Sum(Box::new(a), Box::new(Calc::Function(b))),
+      (Calc::Value(a), b) => (a.add(V::from(b))).into(),
+      (a, Calc::Value(b)) => (V::from(a).add(*b)).into(),
       (a @ Calc::Sum(..), b @ Calc::Sum(..)) => V::from(a).add(V::from(b)).into(),
     }
   }