diff --git a/firmware/common/hackrf_core.c b/firmware/common/hackrf_core.c
index f2abd656..9f5806eb 100644
--- a/firmware/common/hackrf_core.c
+++ b/firmware/common/hackrf_core.c
@@ -368,11 +368,11 @@ void pin_setup(void) {
 	GPIO_DIR(PORT_CPLD_TDI) &= ~PIN_CPLD_TDI;
 	
 	/* Configure SCU Pin Mux as GPIO */
-	scu_pinmux(SCU_PINMUX_LED1, SCU_GPIO_FAST);
-	scu_pinmux(SCU_PINMUX_LED2, SCU_GPIO_FAST);
-	scu_pinmux(SCU_PINMUX_LED3, SCU_GPIO_FAST);
+	scu_pinmux(SCU_PINMUX_LED1, SCU_GPIO_NOPULL);
+	scu_pinmux(SCU_PINMUX_LED2, SCU_GPIO_NOPULL);
+	scu_pinmux(SCU_PINMUX_LED3, SCU_GPIO_NOPULL);
 	
-	scu_pinmux(SCU_PINMUX_EN1V8, SCU_GPIO_FAST);
+	scu_pinmux(SCU_PINMUX_EN1V8, SCU_GPIO_NOPULL);
 	
 	scu_pinmux(SCU_PINMUX_BOOT0, SCU_GPIO_FAST);
 	scu_pinmux(SCU_PINMUX_BOOT1, SCU_GPIO_FAST);