diff --git a/src/eval.rs b/src/eval.rs
index c7e50a802c..fb8d1d4447 100644
--- a/src/eval.rs
+++ b/src/eval.rs
@@ -172,7 +172,7 @@ fn eval_apply(expr: Evaluated, args: Vec<Expr>, vars: &Scope) -> Evaluated {
 }
 
 #[inline(always)]
-fn eval_closure(args: Vec<Evaluated>, arg_patterns: SmallVec<[Pattern; 4]>, vars: &Scope)
+fn eval_closure(args: Vec<Evaluated>, arg_patterns: SmallVec<[Pattern; 2]>, vars: &Scope)
     -> Result<Scope, expr::Problem>
 {
     if arg_patterns.len() == args.len() {
@@ -292,7 +292,7 @@ fn eval_operator(Evaluated(left_expr): &Evaluated, op: Operator, Evaluated(right
 }
 
 #[inline(always)]
-fn eval_case (condition: Evaluated, branches: SmallVec<[(Pattern, Box<Expr>); 4]>, vars: &Scope) -> Evaluated {
+fn eval_case (condition: Evaluated, branches: SmallVec<[(Pattern, Box<Expr>); 2]>, vars: &Scope) -> Evaluated {
     let Evaluated(ref evaluated_expr) = condition;
 
     for (pattern, definition) in branches {
diff --git a/src/expr.rs b/src/expr.rs
index 8fa8b60018..9f6a29b2d8 100644
--- a/src/expr.rs
+++ b/src/expr.rs
@@ -19,7 +19,7 @@ pub enum Expr {
     Func(Ident, Vec<Expr>),
     Apply(Box<Expr>, Vec<Expr>),
     Operator(Box<Expr>, Operator, Box<Expr>),
-    Closure(SmallVec<[Pattern; 4]>, Box<Expr>),
+    Closure(SmallVec<[Pattern; 2]>, Box<Expr>),
 
     // Sum Types
     ApplyVariant(String, Option<Vec<Expr>>),
@@ -29,7 +29,7 @@ pub enum Expr {
 
     // Conditionals
     If(Box<Expr>, Box<Expr>, Box<Expr>),
-    Case(Box<Expr>, SmallVec<[(Pattern, Box<Expr>); 4]>),
+    Case(Box<Expr>, SmallVec<[(Pattern, Box<Expr>); 2]>),
 
     // Error
     Error(Problem),