diff --git a/src/core/compileInputs.go b/src/core/compileInputs.go
index c4d5f1a..724f089 100644
--- a/src/core/compileInputs.go
+++ b/src/core/compileInputs.go
@@ -23,11 +23,12 @@ func (f *Function) compileInputs() {
 
 			for _, field := range structType.Fields {
 				param := &ssa.Parameter{
-					Index:  uint8(offset + i),
-					Name:   fmt.Sprintf("%s.%s", input.Name, field.Name),
-					Typ:    field.Type,
-					Tokens: input.Tokens,
-					Source: input.Source,
+					Index:     uint8(offset + i),
+					Name:      fmt.Sprintf("%s.%s", input.Name, field.Name),
+					Typ:       field.Type,
+					Tokens:    input.Tokens,
+					Structure: structure,
+					Source:    input.Source,
 				}
 
 				f.Append(param)
diff --git a/src/ssa/Parameter.go b/src/ssa/Parameter.go
index cac7495..23434c3 100644
--- a/src/ssa/Parameter.go
+++ b/src/ssa/Parameter.go
@@ -9,9 +9,10 @@ import (
 
 // Parameter is an input parameter for a function call.
 type Parameter struct {
-	Typ    types.Type
-	Name   string
-	Tokens token.List
+	Typ       types.Type
+	Name      string
+	Tokens    token.List
+	Structure *Struct
 	Liveness
 	Source
 	Index uint8
@@ -20,6 +21,7 @@ type Parameter struct {
 func (v *Parameter) Inputs() []Value      { return nil }
 func (v *Parameter) IsConst() bool        { return true }
 func (v *Parameter) Replace(Value, Value) {}
+func (v *Parameter) Struct() *Struct      { return v.Structure }
 func (v *Parameter) String() string       { return fmt.Sprintf("args[%d]", v.Index) }
 func (v *Parameter) Type() types.Type     { return v.Typ }
 
diff --git a/tests/ignore-unused-field.q b/tests/ignore-unused-field.q
new file mode 100644
index 0000000..85997d6
--- /dev/null
+++ b/tests/ignore-unused-field.q
@@ -0,0 +1,14 @@
+main() {
+	foo("foo")
+	bar("bar")
+}
+
+foo(s string) {
+	_(s.ptr)
+}
+
+bar(s string) {
+	_(s.len)
+}
+
+_(_ any) {}
\ No newline at end of file
diff --git a/tests/tests_test.go b/tests/tests_test.go
index 358500d..3bb3a4d 100644
--- a/tests/tests_test.go
+++ b/tests/tests_test.go
@@ -60,6 +60,7 @@ var tests = []run{
 	{"return-3", "", "", 0},
 	{"return-4", "", "", 0},
 	{"return-string", "", "Hello\n", 0},
+	{"ignore-unused-field", "", "", 0},
 	{"hello", "", "Hello\nHello\nHello\n", 0},
 	{"escape", "", "a\tb\nc\td\n", 0},
 	{"script", "", "Hello\n", 0},