diff --git a/internal/requestflag/innerflag.go b/internal/requestflag/innerflag.go
index 528915f..866ce27 100644
--- a/internal/requestflag/innerflag.go
+++ b/internal/requestflag/innerflag.go
@@ -32,6 +32,8 @@ type InnerFlag[
 	// map[string]any before SetInnerField runs. The hint is ignored for typed outer
 	// flags whose zero value already carries a dispatchable reflect.Kind.
 	OuterIsArrayOfObjects bool
+
+	hasBeenSet bool
 }
 
 // GetDataAliases returns the aliases recognized when parsing inner field keys from piped or flag YAML.
@@ -89,6 +91,7 @@ func (f *InnerFlag[T]) Set(name string, rawVal string) error {
 
 		if settableInnerField, ok := f.OuterFlag.(SettableInnerField); ok {
 			settableInnerField.SetInnerField(f.InnerField, parsedValue)
+			f.hasBeenSet = true
 		} else {
 			return fmt.Errorf("Cannot set inner field on %v", f.OuterFlag)
 		}
@@ -106,7 +109,7 @@ func (f *InnerFlag[T]) String() string {
 }
 
 func (f *InnerFlag[T]) IsSet() bool {
-	return false
+	return f.hasBeenSet
 }
 
 func (f *InnerFlag[T]) Names() []string {
diff --git a/internal/requestflag/innerflag_precedence_test.go b/internal/requestflag/innerflag_precedence_test.go
new file mode 100644
index 0000000..ad63103
--- /dev/null
+++ b/internal/requestflag/innerflag_precedence_test.go
@@ -0,0 +1,36 @@
+package requestflag
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/urfave/cli/v3"
+)
+
+func TestInnerFlagCLIValueBeatsPipedData(t *testing.T) {
+	t.Parallel()
+
+	outer := &Flag[map[string]any]{
+		Name:     "address",
+		BodyPath: "address",
+	}
+	assert.NoError(t, outer.PreParse())
+
+	cityInner := &InnerFlag[string]{
+		Name:       "address.city",
+		InnerField: "city",
+		OuterFlag:  outer,
+	}
+	assert.NoError(t, cityInner.Set("address.city", "cli-value"))
+	assert.True(t, cityInner.IsSet())
+
+	data := map[string]any{
+		"address": map[string]any{"city": "piped-value"},
+	}
+	cmd := &cli.Command{Flags: []cli.Flag{outer, cityInner}}
+	assert.NoError(t, ApplyStdinDataToFlags(cmd, data))
+
+	outerVal, ok := outer.Get().(map[string]any)
+	assert.True(t, ok)
+	assert.Equal(t, "cli-value", outerVal["city"])
+}