diff --git a/hal/mbed_compat.c b/hal/mbed_compat.c
index 33e5930004..14fd46979e 100644
--- a/hal/mbed_compat.c
+++ b/hal/mbed_compat.c
@@ -78,7 +78,6 @@ MBED_WEAK void spi_get_capabilities(PinName ssel, bool slave, spi_capabilities_t
 
     // check if given ssel pin is in the cs pinmap
     const PinMap *cs_pins = spi_master_cs_pinmap();
-    PinName pin = NC;
     while (cs_pins->pin != NC) {
         if (cs_pins->pin == ssel) {
 #if DEVICE_SPISLAVE