diff --git a/shared-bindings/audiobusio/PDMIn.c b/shared-bindings/audiobusio/PDMIn.c
index cbb06bde4a..b43adecba3 100644
--- a/shared-bindings/audiobusio/PDMIn.c
+++ b/shared-bindings/audiobusio/PDMIn.c
@@ -46,7 +46,7 @@
 //|   Create a PDMIn object associated with the given pins. This allows you to
 //|   record audio signals from the given pins. Individual ports may put further
 //|   restrictions on the recording parameters. The overall frequency is
-//|   determined by `frequency`x`oversample`, and the total must be 1MHz or
+//|   determined by `frequency` x `oversample`, and the total must be 1MHz or
 //|   higher, so `frequency` must be a minimum of 16000.
 //|
 //|   :param ~microcontroller.Pin clock_pin: The pin to output the clock to