diff --git a/sys/dev/acpi_support/acpi_ibm.c b/sys/dev/acpi_support/acpi_ibm.c
index 2072cf70edc7..376b61095d6e 100644
--- a/sys/dev/acpi_support/acpi_ibm.c
+++ b/sys/dev/acpi_support/acpi_ibm.c
@@ -383,7 +383,7 @@ acpi_status_to_errno(ACPI_STATUS status)
 static void
 ibm_led(void *softc, int onoff)
 {
-	struct acpi_ibm_softc *sc = (struct acpi_ibm_softc *)softc;
+	struct acpi_ibm_softc *sc = softc;
 
 	ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);