diff --git a/marshal.go b/marshal.go
index b6e8ec1..3e92a57 100644
--- a/marshal.go
+++ b/marshal.go
@@ -470,7 +470,12 @@ func (d *Decoder) valueFromTree(mtype reflect.Type, tval *Tree) (reflect.Value,
 			opts := tomlOptions(mtypef, an)
 			if opts.include {
 				baseKey := opts.name
-				keysToTry := []string{baseKey, strings.ToLower(baseKey), strings.ToTitle(baseKey)}
+				keysToTry := []string{
+					baseKey,
+					strings.ToLower(baseKey),
+					strings.ToTitle(baseKey),
+					strings.ToLower(string(baseKey[0])) + baseKey[1:],
+				}
 				for _, key := range keysToTry {
 					exists := tval.Has(key)
 					if !exists {
diff --git a/marshal_test.go b/marshal_test.go
index 8d00322..9c401b3 100644
--- a/marshal_test.go
+++ b/marshal_test.go
@@ -1120,3 +1120,20 @@ func TestUnmarshalBadDuration(t *testing.T) {
 		t.Fatalf("unexpected error: %s", err)
 	}
 }
+
+var testCamelCaseKeyToml = []byte(`fooBar = 10`)
+
+func TestUnmarshalCamelCaseKey(t *testing.T) {
+	var x struct {
+		FooBar int
+		B      int
+	}
+
+	if err := Unmarshal(testCamelCaseKeyToml, &x); err != nil {
+		t.Fatal(err)
+	}
+
+	if x.FooBar != 10 {
+		t.Fatal("Did not set camelCase'd key")
+	}
+}