diff --git a/compiler/module/src/low_level.rs b/compiler/module/src/low_level.rs
index cf6db1f394..bd31c5031d 100644
--- a/compiler/module/src/low_level.rs
+++ b/compiler/module/src/low_level.rs
@@ -100,3 +100,100 @@ pub enum LowLevel {
     Hash,
     ExpectTrue,
 }
+
+impl LowLevel {
+    pub fn is_higher_order_function(&self) -> bool {
+        use LowLevel::*;
+
+        match self {
+            StrConcat
+            | StrJoinWith
+            | StrIsEmpty
+            | StrStartsWith
+            | StrStartsWithCodePoint
+            | StrEndsWith
+            | StrSplit
+            | StrCountGraphemes
+            | StrFromInt
+            | StrFromUtf8
+            | StrToBytes
+            | StrFromFloat
+            | ListLen
+            | ListGetUnsafe
+            | ListSet
+            | ListSetInPlace
+            | ListSingle
+            | ListRepeat
+            | ListReverse
+            | ListConcat
+            | ListContains
+            | ListAppend
+            | ListPrepend
+            | ListJoin
+            | ListRange
+            | DictSize
+            | DictEmpty
+            | DictInsert
+            | DictRemove
+            | DictContains
+            | DictGetUnsafe
+            | DictKeys
+            | DictValues
+            | DictUnion
+            | DictIntersection
+            | DictDifference
+            | SetFromList
+            | NumAdd
+            | NumAddWrap
+            | NumAddChecked
+            | NumSub
+            | NumSubWrap
+            | NumSubChecked
+            | NumMul
+            | NumMulWrap
+            | NumMulChecked
+            | NumGt
+            | NumGte
+            | NumLt
+            | NumLte
+            | NumCompare
+            | NumDivUnchecked
+            | NumRemUnchecked
+            | NumIsMultipleOf
+            | NumAbs
+            | NumNeg
+            | NumSin
+            | NumCos
+            | NumSqrtUnchecked
+            | NumLogUnchecked
+            | NumRound
+            | NumToFloat
+            | NumPow
+            | NumCeiling
+            | NumPowInt
+            | NumFloor
+            | NumIsFinite
+            | NumAtan
+            | NumAcos
+            | NumAsin
+            | NumBitwiseAnd
+            | NumBitwiseXor
+            | NumBitwiseOr
+            | NumShiftLeftBy
+            | NumShiftRightBy
+            | NumShiftRightZfBy
+            | NumIntCast
+            | Eq
+            | NotEq
+            | And
+            | Or
+            | Not
+            | Hash
+            | ExpectTrue => false,
+
+            ListMap | ListMap2 | ListMap3 | ListMapWithIndex | ListKeepIf | ListWalk
+            | ListWalkUntil | ListWalkBackwards | ListKeepOks | ListKeepErrs | ListSortWith
+            | DictWalk => true,
+        }
+    }
+}